Z-axis doesn’t move

I’ve had problems with my lathe after running ‘reference’ in Flex GUI.
When both axes are  homed, I can jog the X-axis without any problems.
But the Z-axis doesn’t move. If I run ‘unhome’ on the X or Z, I can jog the Z-axis.
I switched to Probe Basic and it works as intended with the same INI file
no problems with jogging once the axes are  homed.
I checked with HalShow, and the difference between Flex GUI and PB was that the telop
function worked on both axes in PB but only on the X-axis in Flex GUI.
In Flex GUI, the X-axis is 0 and the Z-axis is 1. When the axes are not at home, jogging works normally. Where should I look for the fault?