ati radeon mobility-p agp 4x dont work with gl???

i have a ati radeon mobility-p agp 4x and when i install glsetup he says unknow display devise what 2 do?

To the best of my knowledge, GLSetup hasn’t been updated since Sept. 2001. For the latest OpenGL support, download the drivers from the Ati website: http://www.ati.com