Hello David!
Using Vienna Ensemble 6 (eLicenser) and Vienna Ensemble 7 (iLok) at the same time doesn't work. All of your legacy instruments are available as iLok versions and can be used with Vienna Ensemble 7. I recommend installing the iLok versions of your software and libraries. As Paul has mentioned above, please activate your licenses with the iLok Manager.
Best regards,
Andi
Vienna Symphonic Library