updates on the situation
a add an appeui and checked logred and found this
One of the screens suggests that you may be trying to use a Dragino LG02 device as a Gateway, is this is correct ?
yes , i am using it as gateway
Then its not supported on TTN.
@ahmedzioudi, all the details on the problems with Single, or in your case, Dual Packet Forwarders are in the post linked above.
We’d recommend something like the TTIG or a Dragino LPS8 - anything that can handle all 8 channels.