After firmware install no fan moving

[Roke78]

Hi there,

I have a strange problem with my Prusa I3 Pro B.

I uploaded the firmware and connected everything like in assembly doc shown.

After calibrating everything I noticed that there is no fan turning. Neither board fan, nor extruder fan.

A friend of mine told me about running fans when printer is switched on.

Also I am not able to get any response when turning the fan on in repetier host.

I changed both fans to every slot and nothing moves. What am I doing wrong?

Please help me. Thank you.
Roke