Hi, I just got DCed in the middle of the heroic. When I tried to log in, it says: This World of Warcraft account has been closed and it is no longer available for use. I tried to log in with my girlfriend account to talk to GM, but I got the same message. What is the nature of the problem? Regards. ...

Use realmlist.wtf in your root wow directory and change it with the notepad. Save and relaunch the game. Hope that helps.