Nostalrius Begins - Quality wow vanilla realm (1.12)

Hello! i seem to have a problem here with connection.
The error message is "This World of Warcraft account has been closed and is no longer available for use. Please go to(...)"

Can i get some help here.i really don t see any reason for a ban, and i'm pretty sure there is an issue with connection.
account name
Hanniball
Thank you very much.

problem solved already ... no need for help anymore !