I am having a heck of a time getting sound from my Hitachi 53UWX10B. I have my Motorola digital cable box audio and video composite cables going to the "tv/dbs" on the Denon 3802. I have the monitor out from the Denon going to the "input 1" connection on the Hitachi and I get a picture, but NO sound. I get sound from my VCR and DVD no problem. Where do I hook up the audio composite cables to get sound for cable tv?