Hey, thanks for your answer, what do you mean with aligned? My printbed is aligned. The belts should be right, but i will check it tomorrow. Its a Wanhao duplicator 3 ( makerbot replicator 2x replica i think) nozzle is 0,4mm.
I thought already about to change from skeinforge to slic3r, maybe i have to make this...

cu and good night ( here it is 10:36 pm )
Ole