Just hooked up new Panasonic BD60 blue-ray DVD player to 6+ year old Onkyo Receiver ((TX-DS575X) via an optical digital audio cable. Didn't get any sound. (Video is hooked up via component video cables as before.) Didn't touch any of the connections from the receiver to the 6 year old HD-ready rear projection TV. The previous audio from the old DVD player to the Onkyo was connected via a coaxial cable (but the BD60 no longer has that as an output - just Optical digital audio cable). Is this a menu adjustment to the Panasonic player, the Onkyo, or what? Do I need to tell the dvd player or Onkyo receiver that I've changed the connection from coaxial to optical? Thanks. Michael