Won't connect

Hello, just downloaded client today (TBC and WOTLK versions), excited to try out TBC and no problems there, just now i tried to play WOTLK but it' stuck on "connecting" and then error msg "unable to connect. if this persists concact blizzard". Any help? i assume account info is same for both clients, otherwise i'd get an "info incorrect" error or something.

i have the same problem for WOTLK, cant connect for 3 days now.. i read old instructions how to solve the problems on forum, but did not work for me..