Help I have just purchased Sony Amp STRDA2400, Sony Blueray BDP350, Kef 2005.3 speakers. Taken all day to set up, picture beautiful, but no sound. Amp linked to Philips TV via HDMI to DVI. Blueray and Sky HD box linked to Amp via HDMI. Kef speakers connected and calibrated but can not get any sound. What are we doing wrong.