Logitech camera C920 and the C930e not recognized by flash

I'm on a Mac OS 10.10.5. I bought the Logitech camera C920 and the C930e. Both work with Quickview, Skype and other non flash programs. However, my cameras will not be recognized in a live stream flash webcam program. I've changed all the setting in flash to allow the sites but nothing works. I have the latest version and have tried other browsers with their plugins. The cameras are plug and play so there aren't any drivers to install. My webcam people are stumped and logitech doesn't know what to do. Help!