Not sure if its from DDOS or not..

Just came back from a 6 month away from WOW and noticed this awesome server, but I can't seem to log in. It gives me the following screen:
http://imgur.com/mwywlOF

Not sure if this is related ta the DDOS going on or something I need to do. It gives me this error as soon as i hit login.

Keep trying to login, it happens from time to time, might be a hiccup in the login server.

It was my fault - I needed to update the realmlist from molten-wow.

Thanks though!