I just upgraded my logitech z-540 (the cheap ones) to a set of monsoon mh-505 5.1 speakers. I was sooo excited when they came but after hooking everything up, i noticed the center speaker has no sound. I have a creative soundblaster live! value soundcard. I thought this card supports 5.1 speakers?? maybe i am just dumb....i even downloaded the newest drivers but nothing seem to work. Do I need to upgrade to a new soundcard and if so which one? I heard audigy, audigy 2, and hercules fortissmo (cuz it's so cheap!) are pretty good. Will I notice a sound quality difference in relation to the price difference between those cards? Thanks for any advice!