Radeon 9000 PRO by ATI

I have purchaced an Radeon 9000 PRO by ATI, It works except when I try to play Microsoft Combat Simulator I, II or III. It will not run Star Wars Pod racer. I have installed it in a IBM 200xl @server running Windows 2000. The mother board is a Via chip set which I have run the VIA hyyerion 4 in 1 drivers. I have installed Windows 2000 service pack. I have tried everything I can think of, anyone have any suggestions. The processor is a Celeron 1200 mhz.