Game crush on start with message

Hi, the game fails to run with the message: 
"Unable to initialize Graphics system.
Video card unsupported."
I tried reinstalling the geforce driver according to the FAQ page and still nothing.
I tried installing the game as an administrator and still nothing.

What should I do ?

My video card is Nvidia GeForce gts 250. It has 1 GB ram so it should run the game.

Thanks for helping me.