forumdisplay.php Problem

[Xp.Warrior]

When I Click On Any Section Then Show This Error In Vbulletin 4.2
Not Acceptable

An appropriate representation of the requested resource /forumdisplay.php could not be found on this server.

Additionally, a 404 Not Found error was encountered while trying to use an ErrorDocument to handle the request.
Any One Help Me Thanks

[BSMedia]

Thats a 404 error. Are you sure forumdisplay.php exisits?

[kh99]

If you search at vbulletin.com for "An appropriate representation of the requested resource", there are a lot of threads mentioning this. I looked at one and the problem turned out to be with mod_security, but I don't know if that's the only cause.

[Xp.Warrior]

Thats a 404 error. Are you sure forumdisplay.php exisits?

Yes I Check forumdisplay.php in my Ftp available But Still Showing Error