I have a DirecTV receiver (HR24-500) and I can't get the Surround Sound (BETA) option to work. When I enable that setting and go back in to the TV app, I get no picture or sound. I've tried to change the settings on the DirecTV box itself, and have had no luck. I was able to get picture and video if I turn off the Dolby Digital on the DirecTV receiver, but of course, there's no actual surround sound because the satellite box isn't sending Dolby signals. As soon as I turn on the Dolby Digital on the DirecTV box, the video freezes and there's no audio. Has anyone gotten this to work properly?