How to get the Offline Button In Mach3 to Turn Holding Torque Off

Hi

I have a 4 axis CNC hot wire and I am running a Gecko G540 with Mach3. I recently switched over from using a parallel port to an Ethernet Smooth Stepper. I am looking for way to use the offline button in Mach to turn off the holding torque on the motors. I used to have this set up several years ago so I know it can work with Mach3 and the G540 with a parallel port. Anyone know how to get this set up with the Smooth stepper? Thanks in advance.