Thanks a lot i have create one and i have get an activation code.
in reality i can't register an extention in 3CX phone and not in Snom300, in first time i was thinking that is because not activated, now after activation i have restarted the service. but the extention still not registred in the two phone.
After installation i have create a domaine and after i create 3 extention (2000, 2001, 2002).
i want to tell you that i have delete all Extensions i found after installation.
please help me.