Thread:Project:Support desk/404 error only on two links, community portal and recent changes.

media Wiki 1.16 PHP 5.3.3 Mysql 5.1.52 Windows 2008 iis7

when browsing the media wiki site locally on the server all links work fine. Yet when i try to browse from my workstation, these two links do not work community portal & recent changes. i get :-

404 - File or directory not found. The resource you are looking for might have been removed, had its name changed, or is temporarily unavailable.

the reset of the site works fine on my workstation.

can anyone help point me in the correct direction.

Cheers Mark