Can't connect to icecrown realm

I can't connect to icecrown realm but it was working just as fine yesterday, other realms work fine
I'm located in Iran and i'm not the only one who have this issue lots of my friends also started reporting this issue, looks like everyone get stuck in a specief login stage like for some connecting, connecting to realm and etc... but for me it gets stuck at Success message and when i click the the cancel button or wait untill the message disappears i can select another realm to play