A colleague has just purchased the following, Tosh SD-44 HKSB DVD Surround System, Panasonic Plasma TH42PWD7. He is trying to incorporate it into his Sky box but no matter how we wire it up, we cannot get any sound out of the Sky system through the Toshiba. Are we doing something silly?? If anyone has a similar set up, please advise as to how you have yours connected. Many thanks in advance.