I posted a similar post about a week ago & did not get much of a response. Perhaps my problem is MY PROBLEM. Using an optical signal & the DST DD set to on, I find when flipping to a DD channel the audio locks up, if I enter the dst menu & toggle DD off I get sound, toggle again to on & DD works fine. This procedure is the ONLY way I can get DD. I don't want to "toggle" every time I want to watch a program with 5.1 material. Anyone else with this problem? I also have a DirectTivo & checked DD on Starz & it works fine so I know it is not a receiver problem. This is my third DST with the same problem & am beginning to think the problem is mine. I would be embarrassed to do a fourth exchange but at 850.00 I cant "live with it". Please help me.