it happens to me all the time, just change or forgot and reset your password every 3days.
just try this out dont log in with in 1 day just dont try to open up your account for just one day.
and im sure the next day you will get in the game. its just a game error. its sad but dont feel bad it happens
i already posted this kind of problem in this kc forums and it seems that we dont have an active gm that will fix this kind of problem just be patient.