Version R4.5b of groov server for windows does not correctly install SSL certificates from third party vendors. My example, I use NetworkSolutions. I tried re-installing the certificate as described on page 26 of the manual 2078_groov_Server_User_Guide and the certificate utility reported the certificate installed correctly. I also tried rebooting the computer as well.
Once I uninstalled r4.5b and installed version R4.4c, the problem went away and my SSL certificate worked as expected. In fact, I did not have to reinstall the certificate at all, it was already there.
One word of caution, I had to restore to my backup of the project.grv file in order for r4.4c to work correctly.