I would guess that you don't have the latest version of DirectX installed, you can find out how to check this at:
http://www.mtu.com/vbulletin/showthr...p?threadid=322
The only other thing I don't know about is that extra game card that you have in the computer, I would try pulling it and see what happens. The last thing I can think of is that I would make sure you go to your Video Card Manufacturers website and download there very latest drivers for the system. This can usually fix quite a few problems.