Basics for setting up LoRaHAT/GPS on Raspberry Pi

Hello Sir,
Can I use my Dragino LoraHAT v1.4 with Raspberry pi 3B+ as dual channel packet forwarded? If Yes, what should I mention in the server addresses?

As of now, my Gateway shows “Successfully contacted server router.eu.staging.thethings.network” band the Thread is activated on the Pi.

But on the status of TTN, after registering the gateway, it shows “not connected”, what possibly could be the reason?

P.S. : When I tried it with single channel packet forwarder, the situation was same