Extruder not heating no 12V ramps (no replies)

Hi im having a strange problem

im using ramps 1.3 got 12v on my bed and it heats (using pronterface)
but it seems i does not heat my extruder.

I tested the fuses and the work.
i heated my thermistor aroudn the copper part and pronterface sees the themp rising.

but is seems it does not heat my printerhead :s even no 12v on the pins for my extruder

any idea's ?

using kliment-Sprinter-b682014 in my arduino