I recently purchased a Polk SurroundBar 6000. It was easy to set up and I am pleased with most of the sound particularly with music. My one concern at this time is that the owner's manual says the Source LED is supposed to turn solid Green when the Bar is receiving a Dolby Digital signal. I have tried playing Dolby Digital music as well as Dolby Digital movies and the LED remains Blue. I have my DVR cable box and a BluRay disc player both connected to my TV via HDMI cables. I am using the supplied Digital Optical Cable from the TV to the SurroundBar. Why am I not getting the Green LED with Dolby Digital sources?