Help With PS Cs4 GPU Problem Can't see photo

I have an problem with the graphics card acceleration. It detects my video card but when i enabled it, and go open a photo, the photo opens but can't see no photo. I can see that i'm zooming in and out of the photo but nothing, the only thing i see is gray. Nothing more. And when i close PS, and then open it again it tells me to go to the manufacturer's site to update the latest drivers. And i have already installed the latest but the same problem.
I hope you guys can help me out...

Pc Specs

Intel Core 2 Quad Q9300 2.50GHz
RAM 8.00GB
64 Bit Vista Home Premium Service pack 1
Graphic Card Asus ENGTX 280 1GB

Graphics GPU Features

NVIDIA® GeForce GTX280
PCI Express & PCI Express 2.0 support
Microsoft DirectX 10 and Shader Model 4.0 support
OpenGL®2.1 support
HDCP complian

Contact NVidia - you need updated drivers, and they may not have posted all the fixes for your model card and OS yet.