Avoid using "cracked" versions of Mach3 (like v1.96), as they often fail to load external .dll plugins correctly. Use the official Mach3 Demo to test connectivity first. If you'd like, I can help you with: The exact wiring diagram for your specific stepper drivers.
The "driver" for this board is actually a motion control plugin for Mach3. BL-UsbMach-V2.1.dll or BL-UsbMach-V22.dll . bl-usbmach-v2.1 driver download
: Place the BL-UsbMach.dll (or RnRMotion.dll ) file into this folder. Avoid using "cracked" versions of Mach3 (like v1