I just bought a Denon DCM 777 CD player, my amp is the Harman Kardon AVR 125, and I have tried hooking it up and was not able to get any music and there is power. The women that I bought it from said that it works fine. It powers up, it shuffles thru the 6 CDs and returns to the beginning, but will not play. I would like to hookup the existing RC cables but not sure if they are correct. PLEASE HELP Thank You for your time.