STM32WL55JC17 LoRaWAN ABP activation problem

[Junaid.Q]

Hi,

I am using the NUCLEO-STM32WL55JC1 LoRaWAN board, which I have connected to the TTN through the OTAA activation method as seen in the snapshot below. Now I wanna connect it via the ABP activation method, however, the device can't connect to the TTN. Can someone let me know what mistake is occurring?