This is likely a known issue that has been fixed in 1.7, so I would recommend upgrading at your convenience. You can download the latest software from the etcconnect website here:
If this is indeed the defect your are experiencing, the problem is that some network configuration files can become out of date when you change your IP address. If you are unable to upgrade to 1.7, the workaround is to run GCE once and then reboot. You can find GCE in the shell under Settings>Maintenance. Running GCE will correctly restore the network configuration files.
