Hello. I have mach 3 with the A axis slaved to the Y axis. This set up worked fine so I know the motors are wired correctly. I have loaded a new .XML for a torch height controller and cannot get the A axis to change direction with the hot keys.The Y axis goes forward and reverse with the hot keys but the A axis only goes in one direction with either key. The previous .xml had 999 for the hot key number for A axis but the new .xml will not let me enter any numbers. Why can't I type in 999 for the A axis? Hope this makes sense. Thanks.