Solved it yet?
Didn't you get like a CD when you bought your video card with drivers and such..?
What windows are you running? If you're running windows 7 and If you need to get your video card drivers, click start and search 'Device Manager' and open it or click start > Control Panel > Device Manager - When you opened it, to check what video card you've installed, you should see.. 'Display adapters' click that then it should show you the name of your graphic card.
-Afterwards search in google the name of your graphic card and at the end 'drivers for windows 7 download' Normally the first/second link gives you the correct thing, (dont install it if you don't know about it because this can mess up everything)
- ..Install/update all your drivers
- Install/update DirectX
- Play around with your compatibility settings
- Trying running it as admin..
(i'm no expert)