Going nuts here!!! I have a DVD player (Sony DVP-NS50P) hooked up to my receiver (Yamaha HTR-6050) using this cable http://www.monoprice.com/products/product.asp?c_id=102&cp_id=10236&cs_id=1023603&p_id=2683&seq=1&format=2 I go in the DVD menu and select DD5.1 playback, yet it plays in my mains only. I select STRAIGHT on my AVR and the little PCM light is on. What am i doing wrong here?