Nostalrius Begins - Quality wow vanilla realm (1.12)

Hello all!

I have done everything suggested in the stickied threads, and still can't find a way to fix this. I have the correct account made, and the realmlist is set up right, but as soon as I hit login, it instantly pops up "disconnected from server". It does this no matter what I do, does anyone have an idea how I can fix this or why it's doing it?

What realm does it show in the bottom, right corner of the login screen below the "Terms of Use" button?

I have finally resolved the issue and I am now able to play. Thank you for your response!