Подскажите что значит :

-----Client Initialization Complete -----
Attempting 22 kHz 16 bit [Windows default] sound
-----R_Init -----
Getting Direct3D 9 interface...
Pixel shader version is 2.0
Vertex shader version is 0.0
Video card or driver doesn't accelerate transform and lighting.
Video card or driver doesn't support UBYTE4N vertex data.

Error during initialization:
Video card or driver doesn't support UBYTE4N vertex data.