Just got an XL4, and replaced a Premiere XL which I'll move to another room. Using all the same connections that worked well with my XL. Everything works, except I get no digital audio output from the optical output (and did previously from the XL). I do get audio output from the composite jacks, which feed my zone 2 speakers. All audio and video (component) go to my Pioneer Elite A/V receiver, then to the TV. FiOS cablecard switched no problem. Any thoughts on what is causing the hitch?