Can't login into account after selecting Test Realm.

[Zerfall]

"You got disconnected from the server." for 20 minutes.

Halp!

[Neelo]

Go to your wow folder, go to WTF and open CONFIG.wtf with notepad or any text editor.
Press CTRL+F and search RealmName and replace it with "SET realmName "Nostalrius Begins""

[Corsa93]

I have had the same thing happen to me. I tried what Neelo said but the only WTF folder I see is the realmlist.wtf, but when I tried to open it, it just opens the text editor (when you change the set realmlist). Please help! I cant find the "config.wtf" that was mentioned

[ShuL!]

Try setting another serverlist in WTF file, connect, and then set realmlist back to Nolstarius. It should pompt you which server you want to connect aka give you list where "Nostalrius Begins" can be chosen. It helped me.