On my Toshiba 5700 I also had to change the output type on the DVD player to Analog 6-channel from PCM or bitstream. This makes listening to a DVD-Audio a royal pain but the sound quality is awesome. The menu to do it was pretty buried on mine, so double check your instructions.

Dragonmonger

PS) Fleetwood Mac Rumours is awesome, I love the part about 35 seconds into track one where the drums move around the room to the cymbal on the back left.