NanoBeamM5 19

I have a couple NanoBeamM5 19 with v5.5.9(xw)

I would like to use these as Nodes.

The supported hardware matrix points to the ubnt-loco-m-xw firmware.

I tftp the firmware,  it reboots as normal,  log-in to localnode:8080,  set node name and password as usual,  save the changes.

here it goes south.  the node doesn't reboot.  I still get a 192.168.1.24 ip address from the node and it comes back an an un-configured node.

where do I go from here?

Help!