I just got a new optical cable to connect my Fortissimo III 7.1 to my Onkyo receiver. I changed all the settings in the programs to SPDIF out. For some reason, the best I can do is DPL2 and not DD 5.1 no matter what. I am using Power DVD, VLC, and WMP, but none of them seems to want to pass through DD 5.1 via SPDIF. Is there something I need that I don't have or is this a hardware issue?