Hi,
Perhaps you are running this on VM? CUEAC was not officially supported on CUEAC until V8.0.3 when there was changes done around the licensing. This means that if you were running on VM then a new license would be required after an upgrade.
In order to get a re-host you would need the original LAC or SO number, alternativly it could be found if you knew your old registration code. I might be able to find it based on the email address of the person who got the original license file if you know that?