Nostalrius Begins - Quality wow vanilla realm (1.12)

Hello.

When I try to login to my account, all I get is "Unable to connect".
I've tried both realmlists, "login.nostalrius.org aswell as "login2.nostalrius.org".
I've deleted both the 'WDB' aswell as the 'WTF' folder and still no light at the end of the tunnel.
I tried login in to another account which worked perfectly but since my main is on the first account which I cannot login to, I still want to remove the 'Unable to connect' error message.

Any help? I've tried most things.

Very much thanks in advance!

bump, I am having the same issue, only difference is it tells me "Disconnected from server". Can anyone help?

Just an update for anyone having these issues.

I deleted the whole client and re-installed it and it worked for me. I didn't have any issues logging into the servers after that. I hope this helps people who are having the same issue. Good luck