connection to arduino mega ramps 1.4 (no replies)

I connected arduino mega 2560 to ramps 1.4.
jumpered the pins of the motor driver and connected the drivers.

jumpered end stop and S -, but the motor does not run with pronterface.
in pronterface i can see "echo:endstops hit: X:xxxxxxx"

I also connected extruder header in D10 but there is no tension after 'set'

for instance I loaded the marlin from

[github.com]


help me please!!!!