COD4 MW initialization error.................

Hello,

I have COD MW on my system.
Config: Dual Core E5300 2.6 GHz, 1 Gb ram,250 gb HDD and no graphics card, Win XP SP2.

Whenever I run the game an error is diplayed as:
"Error during inititalization:
Video card or driver doesn't support UBYTE4N vertex data."

Please tell me how to run the game.