Rotary setup on A axis with Arduino (mega) and Ramps 1.4


My machine self built is based on 3 axis (X,Y,Z) arduino mega , ramps 1.4.
All it’s ok, the “rotary” axis is connected to “E0” port (extruder), motor is ok and it can move with manual control from LCD display.
But under lightburn when i setup rotary on A axis and i press buttons to move + or - A axis, nothing append.
Any idea ?

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