Stuck on "Connecting" in TBC, WotlK and MOP

For 3 days when ever i put my ID and password in the Login screen, the system stucks at "Connecting" and after few moments a message comes "Unable to connect".

I checked this from my home and office, but same. I checked another server of TBC and i got connected there. As per my understanding the system is not even getting connected to server as i put wrong id and password as well to check and the same response.

I checked the realmlist and is ok. Set reamlist logon.warmane.com.

In in Account status it is showing "In good standing".

Please help. what is going on

My Character name is Papahunter in Outland (TBC).