The audio associated with the DVI is analogue. You'll need to breakout from the scart (red and white leads) or come straight from the left & right audio connectors and connect to a 3.5mm jack connector or adaptor, that should sort your sound out. Something like this
http://www.play.com/Electronics/Elec...%7Cprd:3515965
You should finf the 3.5mm jack socket nect to DVI input somewhere.
Abs