Getting Disconnected in less than 1 min sometimes 5 seconds.

I'm trying to login with my account ( premium ) and i got the authenticate thing enabled but every time i login ingame it just disconnect me ! i disabled it and i tried i changed IP address i restarted the modem but nothing works this problem been for 2 months and nor ingame or support section gives anything good they all don't know anything .... and it's prob from warmane system not my conx or anything in my side as i could connect to all other server and retail easily and without getting disconnected so it's only on warmane ! i even play other games and everything working more than good for me !