Need some help with WoW problem.

Hello I'm brand new player around and I just downloaded my WoW today. Everything is fine, realmlist is set. Downloaded it from Warmane's site so it should work perfectly. Thing is when I made an account yesterday and tried to log in Blackrock all worked and was fine, when I tried to log Ragnaros or Deathwing I kept getting disconnected every 10 seconds. Firstly I thought it's someone logging my account but then I changed the password and I've no idea what to do right now.

try several times in a row, maybe it is the anti-ddos system

Can't be that cause I tried to log in 20 times.