There is no requirement for a live connection at the time of licensing for versions up to 5.x.
The most likely reasons for your license key not working are:
- You downloaded one version of the voice and purchased a license to the other. Desktop voices are not marked with a speed (for example Miguel) as opposed to telephony voices which are marked with a speed ( Miguel-8kHz)
- You downloaded a version 5 voice and are attempting to use a version 4 key. To upgrade from version to version 5 you may visit
www.cepstral.com/upgrade5 . Some users receive a free upgrade based on the date of purchase.