speedy3

I just bought the Sims2. I installed DirectX 9.0c but when I try to play the game I get the message "Failed to find any DirectX 9.0c compatible graphics adapters in this system! Please make sure you have a DirectX 9.0c compatible graphics adapter and have installed the latest drivers provided by the manufacturer." I'm not really sure what this means or what i need to buy or download, any help would be greatly apprecieted