Mine's a simple question. I have Sky + using a Pace decoder, a Toshiba 32WL48 tele and a Toshiba home cinema system. The home-cinema sound is fed from two phono outputs on the tele, although I have an alternative of optical feed directly from the Pace. The point is I never seem to hear audio from the rear speakers using Sky. Do they in fact broadcast multi-channel or is there a problem with my installation?