Ok. pues no se a donde estara el problema
siempre sale lo mismo
veran pues la url esta asi:
www.misitio.com/foro
aca les dejo una informacion de como esta en el board Settings
Board Name
The name of your message boards. We recommend that it is not over 75 characters.
Nombre del foro
Board URL
The url to your forums.
Include the http://. Do NOT include a trailing slash.
http://www.misitio.com/foro
Homepage Name
The name of your homepage. This will appear in the footer with a link to it.
Nombre del foro
Homepage URL
The full URL of your homepage. This will be linked to in the footer along with its name.
/
Cookie Domain
The domain which cookies should be set to. This can remain blank. It should also start with a . so it covers all subdomains.
en blanco
Cookie Path
The path which cookies are set to. We recommend setting this to the full directory path to your forums with a trailing slash.
una diaganol /
Cookie Prefix
A prefix to append to all cookies set by MyBB. This is useful if you wish to install multiple copies of MyBB on the one domain or have other software installed which conflicts with the names of the cookies in MyBB. If not specified, no prefix will be used.
en blanco
esta es la configuaracion del Boar Setings
espero contar con mas soluciones
Saludos...