problem with cellfactor

[dg29jr]

ok i downloaded the game and installed it fine but when i try to start it i get a white screen and it sends me back to desktop. ive updated all my drivers and still nothen good. any clues? and here is my comp specs

Manufacturer: Acer
Processor: AMD Athlon(tm) 64 X2 Dual Core Processor 4400+ (2 CPUs), ~2.3GHz
Memory: 1790MB RAM
Hard Drive: 500 GB
Video Card: ATI Radeon X1250
Monitor: Generic PnP Monitor
Sound Card: Headphones (High Definition Audio Device)
Speakers/Headphones: high def surround
Keyboard: USB Root Hub
Mouse: USB Root Hub
Mouse Surface:
Operating System: Windows Vista™ Home Premium (6.0, Build 6000) (6000.vista_gdr.090302-1506)