PC won't load 3D games.

[Minime88]

Everytime I join a server on an online game (Call of Duty 2, Battlefield 2) the game won't start - it just freezes. I enter the server and the game freezes. 3/4 of the games graphics are loaded while some parts are 'grey'. I have played these two games before on this very same computer in the past and they worked fine.

I have a Radeon 9700 Pro video card.

My specs are enough to run this game smoothly. But if you really need to know I will post them.

Thanks.