Nostalrius Begins - Quality wow vanilla realm (1.12)

After uninstalling and reinstalling the game, I can no longer log in. Just seconds after I put in my log-in information, the process fails and a "Disconnected from server" message appears on screen. My character name is Leoris. I doubt that I was banned, nor IP locked, so why does the message pop up?

Huh... Well, it started working. Issue has been resolved, sorry for bothering.