Game Crash Error

When I launch my game a message comes up saying "Your driver or video card doesnt support ARB multitexture" twice. Then a long message basically saying my card (ATI radeon HD 4800 seires" isnt supported, and the minimum ATI card is ATI Radeon 8500. Notice the fact that the long message is incorrect, as mine is higher than the minimum requirements. Please help me fix this so i can play the game again.

You need to update or re-install your video card drivers.

http://support.amd.com/us/gpudownload/Pages/index.aspx

Thank you, ill try that.