Hey there, just a quick question. When I was using Windows XP, WMP and iTunes both played music through all 5.1 channels perfectly, but upon upgrading to Vista Ultimate, both only play through the front 2 speakers :\ Very annoying. Anyone know why this is, and if it can be fixed? Sound card is onboard for the P35C-DS3R, Realtek AC97 HD I think, using the latest drivers. Cheers!