RDworks and z axis issue?

Hi,
I have been laser cutting for a number of years so expected to have come across this issue before but have not.

My main computer is in for repair so I have re installed RD works on a temporary one. I adjusted all the settings that I remember were essential for how I use the machine and have my file backups which have the cut settings in them.
However at the end of something being cut, my laser bed then started to raise by its self and didnt stop. Luckily the head seems fine, however I have no idea why the bed is raising.

Does anyone know if this is something in the software i need to change as I have changed computes before and also never had this issue on those occasions.

RD works V8 and Desktop CO2 Laser Cutting Engraving Machine - Pure Mini - 40W - 500mm X 300mm

Thanks
A