Activation or re-activation of ClickView Publisher is often blocked because of a network setting. Click here to see our article on Whitelisting to ensure you have allowed the required sites.
You may also want to double-check the credentials and details within the proxy settings of Publisher, especially if you are required to authenticate, the password used last year may be out of date. Re-enter these details if in doubt.
If you have ensured all of the above and are still experiencing a problem please contact technical support.