i can`t log in on wotlk-Ragnaros

For like 2 days i try to log in on Ragnaros and i can`t.
I enter in game i write password then is telling me "Connecting".
After 30 sec is saying Loging Server down or unable to connect.
Just me i have this problem?
Please help me with and advice or something.
Thank you

i tryed this morning and i entred.So the problem is the night when server is full.
I have premium and i supose to entre whidout waiting but i can`t..is a problem