Sucks that yo haven't resolved this already, there were a bunch of posts up during EA with this problem, including myself but we got it handled pretty quick during EA.

The fix for me and most of the others was to change the firewall settings on the modem/router. Not your OS firewall but the actual modem/router. Try starting with low security settings then working your way up. I had to do a custom setting but a friend of mine just put his on low. I'm sure there are some port forwarding that could be done instead of lowering the firewall settings but I don't know what those are.

This solved the 2002 error and gray start button issue for me and a lot of people I know.