I have had this problem before. I am trying to log in and for two hours, I haven't been able to connect. I don't have a way of knowing if it is on Wizard's side or mine.
When you run the game Wizard101, the window that comes up to let you log in also has a big area for messages such as 'Game is Down'. Please make sure you always read that message before you log in.
If you continue to have issues logging in, contact our support team at support@wizard101.com and when you contact support, please ensure that you give us: ->the account name ->the character name (if applicable) ->as much information about what you encountered as you can, including error messages or screenshots
NEVER send us: ->your password ->your full credit card information
The more information you give up front, the faster your issue can be resolved.