Recovery from comms failure

XB2B-WF SMT- was working fine, then started a reprogramming cycle and now will not return to normal operation. Have tried reset with DIN, nDTR low, nRTS high - gives this result :

Getting modem type…Programming modem…Lost communication with modem
Found bootloader active reprogramming firmware.
Write Parameters…Failed

I have a profile saved from when it was fine, and am using this to try recover. XBEE WI-FI SMT function set, version 2004.

XBEE is mounted on a custom board, with FT232 bridge, reset button.
Any ideas ?

Update - 6 Nov - fixed ! was a power supply issue…