Are you running our LaunchNet7 (v2.0.0)?
What Host have you chosen in the Server Host drop down? It should be sunrise.net-7.org.
When sunrise.net-7.org is chosen, what do you see in the text box to the left of the Check button? Should be something like ONLINE-381.
If you have chosen sunrise.net-7.org then your problem could be a DNS problem. In a DOS box try running this command: tracert sunrise.net-7.org. What IP address does the sunrise.net-7.org name resolve to? Are you able to trace a route all the way to the server?