Black Screen On Startup.

I just bought and installed the game, but i cannot run it. The only thing that happens is that the screen goes black. I waited for a long time but finally had to use "End Task" to kill the game. I have tried to update graphics driver but it does not help. Does anyone have any ideas?

My system is :

Athlon X2 4400+
Geforce 6600GS
2 Gb Mem
Windows Xp SP2

Thanks in advance.