Put your old card back in, and when the computer starts, go to the device manager, and find the video card... Now, uninstall the drivers.... After, install the NEW drivers BEFORE inserting the new card (there shoudl be a CD that came with the new card)... Once the drivers are installed, turn off the computer, and insert the new card... if you did everything right, then everything should work fine!
[glb]Flame[/glb]