please help on Conquer 2.0

i recently downloaded a fairly famouse game called counquer online 2.0, i have a new XP computer also recently bought from Ebay i dont fully understand the specs. i know it has 40 gb harddrive, but the problem seems to be when i load the game up conquer gives me this error message: ''the game can not be started. The problem might be related to your version of Direct3d. It is suggested that yo reinstall the graphics driver. You can click 'ok' to run the direct X diagnostics for details'' i've tried installing a new direct X driver and it doesnt seem to have had any affect. if u could help i'd be very greatful ;]

many thanks