Nostalrius Begins - Quality wow vanilla realm (1.12)

I had a 1.12 files from wowvanilla gaming before.I changed realmlist but it doesnt shot any realm list at bottom left corner. When I enter my username and password it says Can't Connect.I tried every realmlist here is it a problem with files but I tried with feenix one too and I got the same problem wutz to do guys ? !?!?

Download the client from the Nostalrius Website here https://en.nostalrius.org/download-win

A quick look at the top posts in this forum would help yourself.

Beginner's Guide 2.0