I have a Denon AVR-S910W. I have my cable box and xbox running through the receiver and have perfect sound and video going to my TV. When I want to watch Vudu or Netflix on my TV, I get no sound through the receiver speakers. Everything is running through brand new HDMI cables. My TV have an ARC HDMI and an (STB/DVI) HDMI. Why am I not getting sound through the TV HDMI into the Receiver?