Nostalrius Begins - Quality wow vanilla realm (1.12)

Hey there, I just downloaded and installed the game, i also registered on nostalrius.org and changed the realmlist.wtf. When I log in to game and choose a realm, it suddenly disconnects me and I can't log in anymore. It keeps saying "disconnected from server". I tried to delete the WDB folder, but it didn't help. Then I deleted the WTF folder and it temporarily solved the issue with logging in, but again, after I chose a realm, it disconnected me

Are you 100% sure you are trying to connect to the PvP or PvE realm and not one of the test-realms?

You could try and reset the password and change IP lock: https://en.nostalrius.org/password