Extruder motor does not move
I just finished building my Delta, everything is working fine except the Extruder Motor, I have tested the Ramps board with a test firm ware from marlin, all the motors can work with out any problem, but when I load Repetier, by using both Pronterface or Repetier-Host, I can move all the motors, heat up the head and even demonstrate a print, but Filament motor does not move.
I believe all Electronics are fine, I think something is wrong in my firmware set up. any idea is welcome. Thanks