I have recently purchased mezzmo and have sorted out files etc. Now I cannot seem to play music files through home cinema system. I can play them through the tv speakers but no sound when I switch to external speaker. My 7 series samsung tv is connected via HDMI to Onkyo reciever. Blu-ray and SKY HD + box conected to receiver via HDMI as well. Optical leads for sound are used to connect BLU ray and Sky box to receiver. I have tried every setting on reciever eg DVD,CD,AUX etc and still no sound Anyone any ideas?