Motor moving only in one direction

[asuratman]

Hello guys,
I have problem with my motor on y axis on my cnc plasma, it move only in one direction. When I press forward on keyboard, gantry move forward. Then I press backward, the gantry move forward.So the gantry only move in one direction. I have my A axis slaved to Y axis, I check Y axis and A axis one by one since I have problem. Is this something wrong with mach3. How to fix this wrong direction? Maybe, I changed data on mach3 accidentally.

I use MX4660 and ESS for plasma table.

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