I have satellite service with Dish Network. I am using a Sony Digital Audio receiver (STR-DE635) for surround sound. I am running coaxial from my DVD player to the receiver and it is decoding surround sound correctly. I have HD and my satellite receiver is hooked up to my TV (Panasonic Viera) via HDMI. I am then running optical from my TV's digital audio output to the receiver. TV audio is just decoding in stereo, not surround. Any thoughts?

Thank you.