I have a TheaterExcel AV515M sound card and am having some problems with it. First of all, it tries to load 'CMI8738/C3DX PCI Audio Device' twice... one loads correctly and the other one doesn't and causes an error in msgsvr or whatever and won't let me start windows. I tried just disabling the copy that didnt work but still am not getting sound. BTW, I'm using an ASUS A7V333 motherboard. Any suggestions? and what settings do I need to have turned on to get the sound out of the optical out?