I raised the issue with music and MediaShare because I thought I might have a fighting chance. I can get to the point where it looks like MediaShare is actually accessing a track and playing it although with no sound. When it comes to photos I have NEVER gotten even a folder listing. I only get "no media in the folder," "cannot access media," or "cannot access the computer" errors. Once I get these I can't go back to looking at the folder contents for music. It seems like the MediaShare software gets into a state where it doesn't even check for any communication with the PC but assumes it's unreachable from then on.
It's amazing that DirecTV touts MedaShare as a feature, but it behaves like something they've never even tested. I have tried it this round, and I'll forget about it for several months and then think I'll try it again, hoping for improvements. But that's proving to be a sillier and sillier exercise.