Cookies header Access denied error

[the.code]

hello i am facing this strange problem recently i have moved my vb forum but now when i click on cookies and HTTP header options in vb options i get this error

1||1233936669||**.**.**.**||do=options&dogroup=http||http://www.******.com/forum/admincp/options.php?null=0||Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; .NET CLR 2.0.50727; .NET CLR 3.0.04506.648; .NET CLR 3.5.21022)Access Denied, you have been logged.

can someone tell me wut to do about this ? i searched but ddint found anything

[Marco van Herwaarden]

This may be due to mod_security.
While mod_security can be a very powerful tool, misconfigured or overly strict rule sets can interfere with vBulletins Operation. Below for Apache users you can use an htaccess file and add a specific rule to disable mod_security.
Make or edit your forum .htaccess file and add the following code
<IfModule mod_security.c>
SecFilterEngine Off
SecFilterScanPOST Off
</IfModule>
Note, place this file in your main forum directory.
See this also thread: http://www.vbulletin.com/forum/showthread.php?t=167121

[Dismounted]

That "error" is caused by a modification called "vBFirewall".