Do you have documentation for the drivers? That is the first step.
The GND needs to be connected. Take a photo of a driver for us if you have no manual.
Look at the diagnostics page on Mach3 and read the Mach3 manual regarding setup.
Clear Mach3 status line, try to move and see what it says.
Is Mach3 in emergency stop mode?
Are the jog keys enabled?
Super X3. 3600rpm. Sheridan 6"x24" Lathe + more. Three ways to fix things: The right way, the other way, and maybe your way, which is possibly a faster wrong way.