help!! jedi outcast demo problem(maybe driver issu

I download a demo of jedi night 2: jedi outcast( secret level demo) and after i choose single player it starts but then stop and this comes up with this message.

...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 )
...35 PFDs found
...GLW_ChoosePFD failed
...GLW_ChoosePFD( 16, 16, 0 )
...35 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

I'm running bare system requirements, 350 mhz and basic ati 3d rage pro agp 2x card. Please why does all this writting mean