@jmercier When you try to add a key, most likely there are some apache errors being written to your server’s apache error log. If you could supply those, that would help the developers. Also - this plugin is not necessary but makes things easier as far as applying keys to different hosts/groups. You can still use groups to apply a MAC key to a group via group management, and you can still apply a key to an individual host via host management.

OK thank you my prblem is solved now i will post another problem now with license key plugins x)