The most common activation issue for new installations of the Vespa software is it being blocked by antivirus/firewall software. Although the Vespa software is perfectly safe, it does require access to the internet for verification and update checks.
You can check/solve the problem by temporarily disabling any firewall software that may be running, and trying the Vespa activation again. If successful, the Vespa .EXE file will need to be added to the approved/trusted software list in the antivirus/firewall software for future activation and update checks to function.
NOTE: If you are trying to move the Vespa software to a new computer, you may be experiencing activation issues because you have exceeded your Vespa activation limit (2 activations per licence key). Please contact CTi Software support at support@ctiware.com for assistance.