I've just set up a second zone outside using my Yamaha RX-V2700 receiver. It's only running 2-channel stereo which is fine. It was easy to set up and is happily sending music through from the Net/USB input, and sound from my cable. I can't however get it to send the sound from my digital tv. My Sharp PD7X LCD sends 5.1 sound to the receiver via optical. Could this be the reason? Is there anything I can do? Help appreciated because I'm stumped!