Need help understanding an error message

[BlackDragonRage]

I am trying to log on to the server, but when I type in the address and hit enter, it says that "The server responded with an invalid server key." Not sure exactly what to do here. I also do not have the craftland jar installed as I do not know if it up to the new 1.0 release. Thank you for the help.

[Handyman]

Did you downloaded the newst launcher?

If not:
Please read this: viewtopic.php?f=15&t=270" onclick="window.open(this.href);return false;" onclick="window.open(this.href);return false;