i just bought a diamond mm 5.1 sound card, the XS51. i put it in, installed drivers, and everything seemed well, until i tried to play any kinda of games. windows media player sounds great, all the little dings that windows makes, work. but there is no sound in any games. i dont understand what is causing this, but it wont let sound work on Teamspeak either. im tryin to play call of duty 2, but its hard with no sound anyone have any ideas?