Can't log in Frostwolf

Hi
Whenever I try to log in World of Warchraft Mop, I stuck on connected. I am from Serbia btw, and this problem started to apear in about a week ago. Any help ?

did you upgrade your client to 5.4.8 ?

I installed my cliend about month ago and never updated it again. How sould I check that ?

when you open the game on the Log-in screen at a corner below you can see Mist of pandaria 5.4.X, I guess you are still using the old 5.4.2 Client.
So now you have different 3 options:
1) go here: https://www.warmane.com/download and get full 5.4.8 client by selecting "Mist of Pandaria"
2) or by selecting "MoP minimal", it is a 16MB installer which let you play and download the game at same time
3) if you are using 5.4.2 WITHOUT WoD models then you can Upgrade it to 5.4.8 by just downloading the "wow.exe" from 5.4.8 torrent

I have same problem, yesterday it was fixed for few hour, not fuked up AGAIN.