Snake,

Make sure the Toslink is enabled in the sound card.
You may want to try turning off all other outputs except that particular optical and see if you get any sound from the receiver...Also, you may want to check to make sure the optical connection on the receiver has been enabled in the receivers' setup...

Hope this helps...

WhatFurrer

"Meddle not in the affairs of Dragons, for you are crunchy and good with ketchup..."