Hello, I just hooked up my DVD player to my amp. One optical cable going straight into the back of my amp. I go to play a DVD, but all I get is two channel sound from my reciever... and if I press A.F.D Auto it goes to PRO LOGIC over an optical connection... I tried going into the DVD menu and setting the output to Dolby Digital 5.1, however my reciever just isn't pcking up that it's taking in a DD 5.1 signal... just goes straight to two channel or pro logic, HELP!!!!!!!!!!!!!!