I have the same error 2002 for a week now ... I'm from France and I'm on Omega (Chaos)... it's getting really annoying. Can't log in for 30min then suddenly i'm in, it works perfectly then i'm out again for no reason ... have to wait 30min again just to get kicked out in less than an hour again .. Been playing since april before that and I had no problem..
I tried to contact SE they're not answering ..