This problem is typically a networking problem.  Double-check that you can get out to the Internet from the server.  Check that your gateway setting is correct. If there is a firewall between the WiKID server and the Internet, make sure it is not blocking out-bound port 80 traffic.

For example, on a SonicWall you may need to uncheck the box that says: Enforce Host Tag Search for CFS and hit apply.