I get a message, "Could not Load OpenGL Subsystem" when I try to launch Jedi Outcast

Any help out there?

I have had the game installed before on the same computer, and that was without any problems

Ehm, found a threat somewhere where the problem got fixed by reinstalling the driver or something... but wtf does that mean!? I also found another where a guy said he downloaded a file called OpenGL 1.1, but I have tried that too, and I cant run it becouse it is for windows 95. Btw, I'm using a laptop, dunno if that makes any difference. Plz help me out, ty