Lately I've been noticing that if you spend a certain amount of time in-game, you'll get a message saying "could not connect to wizard101, please try again later." I don't know if anyone else has gotten this, but I have. Is this another for of security or something?
It means you were lagged or otherwise disconnected from the game and is usually a network issue on the server (Wizard101) side. About all you can do is reconnect.