Seems I'm having the same issue as well. Got kicked when I was loading into the Twin Adder Barracks with 90002 and now when I try to log back in, I get put in queue followed by either 90002 or 10105.

I tested what Sugata said about the connection status and was able to duplicate it showing that my connection is "Excellent" upon a fresh client boot but goes to "poor" after I get 90002 or 10105 error.