problem with axis movments

Hello All

i am having a problem with the manual movement of the axis in the soft ware repetier,

I move y axis forward with the manual controls, then when i try move it back wards with the manual controls the z axis moves,

i am using a arduino mega 2560 with a ramps 1.4 which are driving DQ542ma"s which run the nema 23 motors.

even if i send g codes they behave the same .

G0 Y100

G28

these are the codes i used.

thanks
Melvin

Problem resolved, turns out i needed to add the enable wire from the ramps 1.4 to the DQ542ma"s aswell as enable the the enable xyz in config h.