Could not login to WoW at this time?

Havent played Warmane in a few months, and tried logging in but got error message:

"Could not login to World of Warcraft at this time. Please try again later."

Is Icecrown down at the moment or something?
Do I need to redownload WoW from the warmane site?

Thanks

I had same problem, need to restart computer and everything will be ok .