Hmm that's weird.. It's been possible for me to log in, so the problem seems to be on your side. Did you recently change your name to include multiple alt codes?
The lobby is abit bitchy when you use too many alt codes, unless you do a glitch. Regardless you should try if you can enter the lobby without alt codes.
If you can't, i would advice reinstalling your game and check if that solves the issue.. The game itself is working normally as far as i can tell :S
P.S.
Did things work out between you and fyre/joker regarding training?