I receive digital over the air audio signal on my Panasonic TV. I have said TV connected to the SC-PT956 via optical cable from the digital output of the TV to the digital input of the Theater System (per the manual as I understand). The Viera link system does not seem to recognize that the TV is using that port and thus each time I set the TV/Video to "TV" the system switches itself to Aux rather than D-IN. I have to switch is manually. Can someone help with that?