I purchased a sound card so i could use my new spekers and not just the right and left ones. I installed it, I set it to be used in the control panel, I switched it to 5.1 setup under the advanced tab, and I plugged all speakers in correctly. However for some reason, only the right and left speaker(and the sub) are the ones that work. The center and satellites for some reason have no sound coming from them. I beleive the card was a Sound Blaster Audigy Value, I think I paid $30 for it, I have lost the box. Does anyone know what could be the matter?