Hello, Everyone. This is my first post. What an amazing site. I've got a problem getting digital surround from both my DVR and DVD player. I've got a Harmon Kardon AVR 520 receiver that has two optical line inputs in the rear and one in the front of the receiver. I can plug the optical line from the DVD into Optical In 1 and get perfect sound in the DVD mode of the receiver. I can plug the DVR into the same line and get perfect sound as well in the same DVD mode. The problem is I can't get digital sound when I have both pluged in to the two optical lines. I've tried switching them and running them through the Video 1 mode. I guessed maybe the 2nd line was bad but the front line isn't getting me the sourround as well. Any suggestions?