Z axis problem in printing (no replies)

Hi, im new in this forum.

Im having a problem with my 3D printer, in the Z axis.
Everething works well. when i do the homing everything works well, in the LCD when i move the axis works well, but when i try to print the z axis insted going up, goes down and press the heated bed and press down the end stop like doesnt exist
i need help i don't know what to do now , i ajust the current of Z axis and still the same, i try to edit the jerk and velocity and still the same.

I run with a Ramps 1.4, Z Axis with a DRV8825 and 2 nema 17 1.8º , the current of this 2 motors are 0.44mA and i try to give more like 0.50 mA and still the same problem.
im using slicer from repetier host, preconfigured for prusa i3.

I attach my configuration file and a video with the problem.

Video: [youtu.be]

thanks!