Nostalrius Begins - Quality wow vanilla realm (1.12)

Hi! When I try to login (Mac client) I first got the message "unable to connect" ... now I get the message that I'm banned.... huh? Could you help me? I have no idea why I should be banned

I do not see a ban on either of your account(s). If you fail the password too many times, you can be blocked from logging in temporarily.