Hi,
It sounds like you have done everything correctly. I would double check the App Key and EUI’s.
Are you using your own Lorawan GW/Packet Forwarder? If so what do the logs say.
Further up in the thread I posted a link to the manual with the AT Commands. This information combined with looking at the source files of the Lorawan library for the Seeeduino (LoRaWAN.cpp) should give you a better idea of the commands available and the ones being used. This is as much information as I have been able to find so far.