Same thing is happening to me too, I was helping a FC member with Dzemael Darkhold.
Server: Ultros
Charecter: Sachi Nightstar
got kicked from server with a 90000 error, and now as i try to reconnect I keep getting either 10102 or 90000, and I can connect useing another charecter, then try again with Sachi and still get 10102 or 90000, and if i get 90000 and try loging itno the server with another charecter it gives me 3102 already loged in., I tried to reload the game 5 times, and even resat my computer to try and fix it.