Toshiba Rear Projection 42WH38B

Hi,

I've got one of these Toshiba rear projections, I'm fairly sure it's 42WH38B, 42" built in dolby-digital decoder, comes with 1 pair of rear speakers. I also have a seperate surround sound system.

I'm having real problems hooking it up properly to my DVD-R and my Sky+.

I want to run the dolby digital from the Sky+ in to the TV, I then want to run the DVD-R dolby digital in to my surround sound system, but because the scart is carrying the sound as well I get the sound coming out of my TV and I have to turn the volume down on the TV (muting puts a little mute icon on the screen).

Should I move to an S-VIDEO cable instead?

Help, I'm a bit lost.

Andrew