I hooked up my Sony LCD Projection (KDF-42WE655) from the audio out to my 3805 TV/DBS audio input. But there's no sound coming out. I muted the Sony (as per the manual) and still no sound. I'm using regular RCA cables. Is there a setting on the receiver that I'm not seeing? I have all the components going through the receiver (dvd, CD, Phono and Tape Deck) which are all working fine. And I'm using Comcast Cable with a cable card in my TV. I wanted to watch HD Channels with the sound going through the receiver but I just can't seem to make it work. Any help or suggestions will be appreciated.