http://www.easy-cnc.com/web/download...s%28NEW%29.pdf

My motor driver is the one above (3 axis micro stepper motor driver )





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I have tried re-installing mach3. Didn't make any difference. If I use Pin 15 (toggled negative) for the Estop, the reset works for 8 seconds, and then falls back into a flashing Reset again. This happens every time. So I have disabled it.
I have checked all wiring...all good. The Driver has its own PSU that the previous owner has set up. The Driver circuit is new.