Nostalrius Begins - Quality wow vanilla realm (1.12)

Hi i have a Login Problem everytime i want to log in in my Account in Log in screen i get instant disconnect and i m not banned or so My Rogue Crazý is on my Account and I cant log on every alt Account of me. But i have for no reason access to my Account! Need help want to play again i get this problem since today noon i played yesterday the last time around 22:00 GMT