Error class_session.php

-URL: villawarez.saapy.com/foro/
-Version del Foro: 1.6.2
-Actualizacion: De MyB 1.6.1 a MyBB 1.6.2 ( No se si cuenta, ya que esta actualización no afectaba a la DB ).
-Informacion del problema:

Buenas.
Al intentar logearme a mi foro, se logea bien, pero a la hora de re-direccionar a la pagina principal del foro me salta este error :

Fatal error: Call to undefined function my_ip2long() in /home/thezeus/public_html/foro/inc/class_session.php on line 190

El problema, esque a simple vista, se logea bien.
Os dejo el Archivo Class_Session.php, por si acaso :

<?php
/**
 * MyBB 1.6
 * Copyright 2010 MyBB Group, All Rights Reserved
 *
 * Website: http://mybb.com
 * License: http://mybb.com/about/license
 *
 * $Id: class_session.php 5016 2010-06-12 00:24:02Z RyanGordon $
 */

class session
{
    public $sid = 0;
    public $uid = 0;
    public $ipaddress = '';
    public $useragent = '';
    public $is_spider = false;
    public $logins = 1;
    public $failedlogin = 0;

    /**
     * Initialize a session
     */
    function init()
    {
        global $db, $mybb, $cache;

        // Get our visitor's IP.
        $this->ipaddress = get_ip();

        // Find out the user agent.
        $this->useragent = $_SERVER['HTTP_USER_AGENT'];
        if(my_strlen($this->useragent) > 100)
        {
            $this->useragent = my_substr($this->useragent, 0, 100);
        }
        
        // Attempt to find a session id in the cookies.
        if(isset($mybb->cookies['sid']))
        {
            $this->sid = $db->escape_string($mybb->cookies['sid']);
            // Load the session
            $query = $db->simple_select("sessions", "*", "sid='{$this->sid}' AND ip='".$db->escape_string($this->ipaddress)."'", array('limit' => 1));
            $session = $db->fetch_array($query);
            if($session['sid'])
            {
                $this->sid = $session['sid'];
                $this->uid = $session['uid'];
            }
            else
            {
                $this->sid = 0;
                $this->uid = 0;
                $this->logins = 1;
                $this->failedlogin = 0;
            }
        }

        // Still no session, fall back
        if(!$this->sid)
        {
            $this->sid = 0;
            $this->uid = 0;
            $this->logins = 1;
            $this->failedlogin = 0;
        }

        // If we have a valid session id and user id, load that users session.
        if($mybb->cookies['mybbuser'])
        {
            $logon = explode("_", $mybb->cookies['mybbuser'], 2);
            $this->load_user($logon[0], $logon[1]);
        }

        // If no user still, then we have a guest.
        if(!isset($mybb->user['uid']))
        {
            // Detect if this guest is a search engine spider. (bots don't get a cookied session ID so we first see if that's set)
            if(!$this->sid)
            {
                $spiders = $cache->read("spiders");
                if(is_array($spiders))
                {
                    foreach($spiders as $spider)
                    {
                        if(my_strpos(my_strtolower($this->useragent), my_strtolower($spider['useragent'])) !== false)
                        {
                            $this->load_spider($spider['sid']);
                        }
                    }
                }
            }

            // Still nothing? JUST A GUEST!
            if(!$this->is_spider)
            {
                $this->load_guest();
            }
        }


        // As a token of our appreciation for getting this far (and they aren't a spider), give the user a cookie
        if($this->sid && ($mybb->cookies['sid'] != $this->sid) && $this->is_spider != true)
        {
            my_setcookie("sid", $this->sid, -1, true);
        }
    }

    /**
     * Load a user via the user credentials.
     *
     * @param int The user id.
     * @param string The user's password.
     */
    function load_user($uid, $password='')
    {
        global $mybb, $db, $time, $lang, $mybbgroups, $session, $cache;
        
        // Read the banned cache
        $bannedcache = $cache->read("banned");    
        
        // If the banned cache doesn't exist, update it and re-read it
        if(!is_array($bannedcache))
        {
            $cache->update_banned();
            $bannedcache = $cache->read("banned");
        }
        
        $uid = intval($uid);
        $query = $db->query("
            SELECT u.*, f.*
            FROM ".TABLE_PREFIX."users u 
            LEFT JOIN ".TABLE_PREFIX."userfields f ON (f.ufid=u.uid) 
            WHERE u.uid='$uid'
            LIMIT 1
        ");
        $mybb->user = $db->fetch_array($query);
        
        $this->logins = $mybb->user['loginattempts'];
        $this->failedlogin = $mybb->user['failedlogin'];
        
        if($bannedcache[$uid])
        {
            $banned_user = $bannedcache[$uid];
            $mybb->user['bandate'] = $banned_user['dateline'];
            $mybb->user['banlifted'] = $banned_user['lifted'];
            $mybb->user['banoldgroup'] = $banned_user['oldgroup'];
            $mybb->user['banolddisplaygroup'] = $banned_user['olddisplaygroup'];
            $mybb->user['banoldadditionalgroups'] = $banned_user['oldadditionalgroups'];
        }

        // Check the password if we're not using a session
        if($password != $mybb->user['loginkey'] || !$mybb->user['uid'])
        {
            unset($mybb->user);
            $this->uid = 0;
            return false;
        }
        $this->uid = $mybb->user['uid'];

        // Set the logout key for this user
        $mybb->user['logoutkey'] = md5($mybb->user['loginkey']);

        // Sort out the private message count for this user.
        if(($mybb->user['totalpms'] == -1 || $mybb->user['unreadpms'] == -1) && $mybb->settings['enablepms'] != 0) // Forced recount
        {
            $update = 0;
            if($mybb->user['totalpms'] == -1)
            {
                $update += 1;
            }
            if($mybb->user['unreadpms'] == -1)
            {
                $update += 2;
            }

            require_once MYBB_ROOT."inc/functions_user.php";
            $pmcount = update_pm_count('', $update);
            if(is_array($pmcount))
            {
                $mybb->user = array_merge($mybb->user, $pmcount);
            }
        }
        $mybb->user['pms_total'] = $mybb->user['totalpms'];
        $mybb->user['pms_unread'] = $mybb->user['unreadpms'];

        if($mybb->user['lastip'] != $this->ipaddress && array_key_exists('lastip', $mybb->user))
        {
            $lastip_add .= ", lastip='".$db->escape_string($this->ipaddress)."', longlastip='".intval(my_ip2long($this->ipaddress))."'";
        }

        // If the last visit was over 900 seconds (session time out) ago then update lastvisit.
        $time = TIME_NOW;
        if($time - $mybb->user['lastactive'] > 900)
        {
            $db->shutdown_query("UPDATE ".TABLE_PREFIX."users SET lastvisit='{$mybb->user['lastactive']}', lastactive='$time' {$lastip_add} WHERE uid='{$mybb->user['uid']}'");
            $mybb->user['lastvisit'] = $mybb->user['lastactive'];
            require_once MYBB_ROOT."inc/functions_user.php";
            update_pm_count('', 2);
        }
        else
        {
            $timespent = TIME_NOW - $mybb->user['lastactive'];
            $db->shutdown_query("UPDATE ".TABLE_PREFIX."users SET lastactive='$time', timeonline=timeonline+$timespent {$lastip_add} WHERE uid='{$mybb->user['uid']}'");
        }

        // Sort out the language and forum preferences.
        if($mybb->user['language'] && $lang->language_exists($mybb->user['language']))
        {
            $mybb->settings['bblanguage'] = $mybb->user['language'];
        }
        if($mybb->user['dateformat'] != 0 && $mybb->user['dateformat'] != '')
        {
            global $date_formats;
            if($date_formats[$mybb->user['dateformat']])
            {
                $mybb->settings['dateformat'] = $date_formats[$mybb->user['dateformat']];
            }
        }

        // Choose time format.
        if($mybb->user['timeformat'] != 0 && $mybb->user['timeformat'] != '')
        {
            global $time_formats;
            if($time_formats[$mybb->user['timeformat']])
            {
                $mybb->settings['timeformat'] = $time_formats[$mybb->user['timeformat']];
            }
        }

        // Find out the threads per page preference.
        if($mybb->user['tpp'])
        {
            $mybb->settings['threadsperpage'] = $mybb->user['tpp'];
        }

        // Find out the posts per page preference.
        if($mybb->user['ppp'])
        {
            $mybb->settings['postsperpage'] = $mybb->user['ppp'];
        }
        
        // Does this user prefer posts in classic mode?
        if($mybb->user['classicpostbit'])
        {
            $mybb->settings['postlayout'] = 'classic';
        }
        else
        {
            $mybb->settings['postlayout'] = 'horizontal';
        }

        // Check if this user is currently banned and if we have to lift it.
        if(!empty($mybb->user['bandate']) && (isset($mybb->user['banlifted']) && !empty($mybb->user['banlifted'])) && $mybb->user['banlifted'] < $time)  // hmmm...bad user... how did you get banned =/
        {
            // must have been good.. bans up :D
            $db->shutdown_query("UPDATE ".TABLE_PREFIX."users SET usergroup='".intval($mybb->user['banoldgroup'])."', additionalgroups='".$mybb->user['oldadditionalgroups']."', displaygroup='".intval($mybb->user['olddisplaygroup'])."' WHERE uid='".$mybb->user['uid']."' LIMIT 1");
            $db->shutdown_query("DELETE FROM ".TABLE_PREFIX."banned WHERE uid='".$mybb->user['uid']."'");
            // we better do this..otherwise they have dodgy permissions
            $mybb->user['usergroup'] = $mybb->user['banoldgroup'];
            $mybb->user['displaygroup'] = $mybb->user['banolddisplaygroup'];
            $mybb->user['additionalgroups'] = $mybb->user['banoldadditionalgroups'];
            $cache->update_banned();

            $mybbgroups = $mybb->user['usergroup'];
            if($mybb->user['additionalgroups'])
            {
                $mybbgroups .= ','.$mybb->user['additionalgroups'];
            }
        }
        else if(!empty($mybb->user['bandate']) && (empty($mybb->user['banlifted'])  || !empty($mybb->user['banlifted']) && $mybb->user['banlifted'] > $time))
        {
            $mybbgroups = $mybb->user['usergroup'];
        }
        else
        {
            // Gather a full permission set for this user and the groups they are in.
            $mybbgroups = $mybb->user['usergroup'];
            if($mybb->user['additionalgroups'])
            {
                $mybbgroups .= ','.$mybb->user['additionalgroups'];
            }
        }

        $mybb->usergroup = usergroup_permissions($mybbgroups);
        if(!$mybb->user['displaygroup'])
        {
            $mybb->user['displaygroup'] = $mybb->user['usergroup'];
        }

        $mydisplaygroup = usergroup_displaygroup($mybb->user['displaygroup']);
        if(is_array($mydisplaygroup))
        {
            $mybb->usergroup = array_merge($mybb->usergroup, $mydisplaygroup);
        }
        
        if(!$mybb->user['usertitle'])
        {
            $mybb->user['usertitle'] = $mybb->usergroup['usertitle'];
        }

        // Update or create the session.
        if(!defined("NO_ONLINE"))
        {
            if(!empty($this->sid))
            {
                $this->update_session($this->sid, $mybb->user['uid']);
            }
            else
            {
                $this->create_session($mybb->user['uid']);
            }
        }
        return true;
    }

    /**
     * Load a guest user.
     *
     */
    function load_guest()
    {
        global $mybb, $time, $db, $lang;

        // Set up some defaults
        $time = TIME_NOW;
        $mybb->user['usergroup'] = 1;
        $mybb->user['username'] = '';
        $mybb->user['uid'] = 0;
        $mybbgroups = 1;
        $mybb->user['displaygroup'] = 1;

        // Has this user visited before? Lastvisit need updating?
        if(isset($mybb->cookies['mybb']['lastvisit']))
        {
            if(!isset($mybb->cookies['mybb']['lastactive']))
            {
                $mybb->user['lastactive'] = $time;
                $mybb->cookies['mybb']['lastactive'] = $mybb->user['lastactive'];
            }
            else
            {
                $mybb->user['lastactive'] = intval($mybb->cookies['mybb']['lastactive']);
            }
            if($time - $mybb->cookies['mybb']['lastactive'] > 900)
            {
                my_setcookie("mybb[lastvisit]", $mybb->user['lastactive']);
                $mybb->user['lastvisit'] = $mybb->user['lastactive'];
            }
            else
            {
                $mybb->user['lastvisit'] = intval($mybb->cookies['mybb']['lastactive']);
            }
        }

        // No last visit cookie, create one.
        else
        {
            my_setcookie("mybb[lastvisit]", $time);
            $mybb->user['lastvisit'] = $time;
        }

        // Update last active cookie.
        my_setcookie("mybb[lastactive]", $time);

        // Gather a full permission set for this guest
        $mybb->usergroup = usergroup_permissions($mybbgroups);
        $mydisplaygroup = usergroup_displaygroup($mybb->user['displaygroup']);
        
        $mybb->usergroup = array_merge($mybb->usergroup, $mydisplaygroup);

        // Update the online data.
        if(!defined("NO_ONLINE"))
        {
            if(!empty($this->sid))
            {
                $this->update_session($this->sid);
            }
            else
            {
                $this->create_session();
            }
        }
    }

    /**
     * Load a search engine spider.
     *
     * @param int The ID of the search engine spider
     */
    function load_spider($spider_id)
    {
        global $mybb, $time, $db, $lang;

        // Fetch the spider preferences from the database
        $query = $db->simple_select("spiders", "*", "sid='{$spider_id}'", array('limit' => 1));
        $spider = $db->fetch_array($query);

        // Set up some defaults
        $time = TIME_NOW;
        $this->is_spider = true;
        if($spider['usergroup'])
        {
            $mybb->user['usergroup'] = $spider['usergroup'];
        }
        else
        {
            $mybb->user['usergroup'] = 1;
        }
        $mybb->user['username'] = '';
        $mybb->user['uid'] = 0;
        $mybb->user['displaygroup'] = $mybb->user['usergroup'];

        // Set spider language
        if($spider['language'] && $lang->language_exists($spider['language']))
        {
            $mybb->settings['bblanguage'] = $spider['language'];
        }

        // Set spider theme
        if($spider['theme'])
        {
            $mybb->user['style'] = $spider['theme'];
        }

        // Gather a full permission set for this spider.
        $mybb->usergroup = usergroup_permissions($mybb->user['usergroup']);
        $mydisplaygroup = usergroup_displaygroup($mybb->user['displaygroup']);
        $mybb->usergroup = array_merge($mybb->usergroup, $mydisplaygroup);

        // Update spider last minute (only do so on two minute intervals - decrease load for quick spiders)
        if($spider['lastvisit'] < TIME_NOW-120)
        {
            $updated_spider = array(
                "lastvisit" => TIME_NOW
            );
            $db->update_query("spiders", $updated_spider, "sid='{$spider_id}'", 1);
        }

        // Update the online data.
        if(!defined("NO_ONLINE"))
        {
            $this->sid = "bot=".$spider_id;
            $this->create_session();
        }

    }

    /**
     * Update a user session.
     *
     * @param int The session id.
     * @param int The user id.
     */
    function update_session($sid, $uid='')
    {
        global $db;

        // Find out what the special locations are.
        $speciallocs = $this->get_special_locations();
        if($uid)
        {
            $onlinedata['uid'] = $uid;
        }
        else
        {
            $onlinedata['uid'] = 0;
        }
        $onlinedata['time'] = TIME_NOW;
        $onlinedata['location'] = $db->escape_string(get_current_location());
        $onlinedata['useragent'] = $db->escape_string($this->useragent);
        $onlinedata['location1'] = intval($speciallocs['1']);
        $onlinedata['location2'] = intval($speciallocs['2']);
        $onlinedata['nopermission'] = 0;
        $sid = $db->escape_string($sid);

        $db->update_query("sessions", $onlinedata, "sid='{$sid}'", 1);
    }

    /**
     * Create a new session.
     *
     * @param int The user id to bind the session to.
     */
    function create_session($uid=0)
    {
        global $db;
        $speciallocs = $this->get_special_locations();

        // If there is a proper uid, delete by uid.
        if($uid > 0)
        {
            $db->delete_query("sessions", "uid='{$uid}'");
            $onlinedata['uid'] = $uid;
        }
        // Is a spider - delete all other spider references
        else if($this->is_spider == true)
        {
            $db->delete_query("sessions", "sid='{$this->sid}'");
        }
        // Else delete by ip.
        else
        {
            $db->delete_query("sessions", "ip='".$db->escape_string($this->ipaddress)."'");
            $onlinedata['uid'] = 0;
        }

        // If the user is a search enginge spider, ...
        if($this->is_spider == true)
        {
            $onlinedata['sid'] = $this->sid;
        }
        else
        {
            $onlinedata['sid'] = md5(uniqid(microtime(true)));
        }
        $onlinedata['time'] = TIME_NOW;
        $onlinedata['ip'] = $db->escape_string($this->ipaddress);
        $onlinedata['location'] = $db->escape_string(get_current_location());
        $onlinedata['useragent'] = $db->escape_string($this->useragent);
        $onlinedata['location1'] = intval($speciallocs['1']);
        $onlinedata['location2'] = intval($speciallocs['2']);
        $onlinedata['nopermission'] = 0;
        $db->replace_query("sessions", $onlinedata, "sid", false);
        $this->sid = $onlinedata['sid'];
        $this->uid = $onlinedata['uid'];
    }

    /**
     * Find out the special locations.
     *
     * @return array Special locations array.
     */
    function get_special_locations()
    {
        global $mybb;
        $array = array('1' => '', '2' => '');
        if(preg_match("#forumdisplay.php#", $_SERVER['PHP_SELF']) && intval($mybb->input['fid']) > 0)
        {
            $array[1] = intval($mybb->input['fid']);
            $array[2] = '';
        }
        elseif(preg_match("#showthread.php#", $_SERVER['PHP_SELF']) && intval($mybb->input['tid']) > 0)
        {
            global $db;
            $array[2] = intval($mybb->input['tid']);
            $thread = get_thread(intval($array[2]));
            $array[1] = $thread['fid'];
        }
        return $array;
    }
}
?>

Espero que se solucione el error.
Si entran a mi foro, veran que no hay imágenes, es devido a que cambie mi foro de directorio, y necesito entrar al PA, para arreglar eso.