Gateway do not acept Nodes

I have correctly configured my chirpstack server based on a Dragino pico gateway (model LG308).
It is correctly working and active.

Also have some nodes (from microchip and Dragino too), but despite the fact that I configure them to work in AU915 or even US915 they never get “Join Acept” from Gateway.

I can see several “Join Request” in the gateway lorawan frames, coming from my nodes, but none of them gets a “Join Accept” as a response.

Thank you very much in advance…

Nico :slight_smile: