when i want to play the game they say this:…restoring display settings
…WARNING: could not set the given mode (3)
…setting mode 3: 640 480 FS
…using colorsbits of 16
…calling CDS: ok
…created window@0,0 (640x480)
Initializing OpenGL driver
…getting DC: succeeded
…GLW_ChoosePFD( 16, 16, 0 )
…23 PFDs found
…GLW_ChoosePFD failed
…GLW_ChoosePFD( 16, 16, 0 )
…23 PFDs found
…GLW_ChoosePFD failed
…failed to find an appropriate PIXELFORMAT
…restoring display settings
…WARNING: could not set the given mode (3)
…shutting down QGL
…unloading OpenGL DLL
----- CL_Shutdown -----
RE_Shutdown( 1 )
GLW_StartOpenGL() - could not load OpenGL subsystem
p.s. i have already installed the openGL