Regarding the no sound issue.......in the Nero Digital guide by Doom9 viewable at http://www.doom9.org/nerodigital.htm it says "You can decide between 2 channel (Stereo) and 6 channel audio (5.1-channel surround). Keep in mind that in order to use 6 ch audio, you'll need an analogue 5.1 output that is hooked up to your speaker system"

I hope this helps!