someone please help, I can't get my Traxis DVB-3500 to pass any AC-3 audio through either the coax or optical outputs. Do the AC-3 ports need to be turned on to pass through from some hidden menu somewhere, or will it auto pass if AC-3 is present? I'm trying to pass "The Tube Music" channel's AC-3 audio to my audio receiver and I can't. Thanks, Chad