Ive just purchased a cmedia CM18738 soundcard and some 5.1 creative speakers but im getting no sound from my centre speaker. Ive downloaded the lastest driver for CM18738 but i can only get centre speaker sound when using audio rack/multi channel demo(cmedia software). I've set surround sound to 5.1 in control panel, not sure what else i can do. I would appreciate any help. thanks, John.