Does anyone have trouble receiving the INHD channels with TWC (I'm in Raleigh, NC)? My sound goes out every few seconds and then comes back on and the picture is also very bad. I've had TWC out to my house twice and they couldn't find a problem other than my signal being weak. Finally they decided to upgrade my main line to RG11, but the problem still exists. HDNet works perfectly as well as all other HD channels. Any ideas on what I can do?