Every page look like the special page

Is it posible to let every page look like the special page like:

http://www.vaultwiki.org/pages/
http://www.vaultwiki.org/pages/Special:Categories

But i get most like:

http://www.voiceofthemany.org/forums...splay.php?f=40

I know i have made a error but i dont know what i did wrong.

You can set a page to appear instead of the forumdisplay page by setting a Forum Link in the Forum Manager for that forum. Ideally you would enter the URL of a wiki page here.

Thanks that was reletive easy to do.