Node not connecting to network

Hi all,
I’m new here and am thankful for this forum and everything I have learnt this far.

Have set up a gateway RAK 7258 which the things stack community edition can see, and so I presume is working and I have set it up correctly.
Trying to set up end device RAK 7205. Keep getting “ERROR: RUI_AT_LORA_PARAMETER_INVALID 82”, which others have suggested means the dev key or app key aren’t set up, however the data suggests they are and the numbers match what is in TTN. I see “joined network:false” and cannot see the node through the web interface. I suspect a node set up problem, but I’m not sure what to try next as I’m very new to this. Below is the lora status if that’s helpful?!

Thank you for seeing if you can teach me some more problem solving skills!
Regards.

at+get_config=lora:status
OK Work Mode: LoRaWAN
Region: AU915
Send_interval: 600s
Auto send status: true
Send_interval work at sleep
MulticastEnable: false
DutycycleEnable: false
Send_repeat_cnt: 0
Join_mode: OTAA
DevEui: “Hex number”
AppEui: 0000000000000000
AppKey: “Hex number”
Class: A
Joined Network:false
IsConfirm: unconfirm
AdrEnable: true
EnableRepeaterSupport: false
RX2_CHANNEL_FREQUENCY: 923300000, RX2_CHANNEL_DR:8
RX_WINDOW_DURATION: 3000ms
RECEIVE_DELAY_1: 1000ms
RECEIVE_DELAY_2: 2000ms
JOIN_ACCEPT_DELAY_1: 5000ms
JOIN_ACCEPT_DELAY_2: 6000ms
Current Datarate: 5
Primeval Datarate: 5
ChannelsTxPower: 0
UpLinkCounter: 0
DownLinkCounter: 0

Try 0000000000000001

Whilst entirely technically correct that all zeros is preferred, it turns out there are many LoRaWAN stacks that just can’t cope with it as all Zeros.

ok thank you. WIll give a try and report back!

Unfortunately @descartes that didn’t seem to do the trick. Are there any other common mistakes/issues of which I should be aware do you think?