Ok i recently had to wipe my hard drive and reinstall Windows XP. And now i've encountered a problem. When i play a VOB file movie with VLC in order to get the sound to play ok i have to select AUDIO DEVICE and put it on "2 Front 2 Rear" or "Stereo" or "Mono". It won't play if its on 5.1 Why is that? Am i missing a driver from dell or what?