OpenGL subsystem

I have installed return to castle wolfenstein, and I am working with XP.
When I want to start the game it says could not OpenGL subsystem.
Where can I find this “driver”, so my son(and me) can play the game?

Did u get the latest drivers for your graphics card (visit the card vendor web site) ?? Does your card support opengl ??

rIO.sK http://www.spinningkids.org/rio