I have been using Messenger 7 beta since the MESS patch was released, and I can do all the stuff you can't, with or without it. As opposed to 6.2, the only thing that doesn't seem to work for me is adding a gmail account as contact.
If your problems persist, I suggest you simply revert back to 6.2. It's not like 7 beta is so much better, save a few features.
If your problems persist, I suggest you simply revert back to 6.2. It's not like 7 beta is so much better, save a few features.