I've got a problem printing labels.

After I've confirmed and checked the contacts for which I'd like to print labels, I select the label and click on PDF. Here I can see that everything's okay. BUT as soon as I print the labels, they are printed only half-sized although all printersettings seem to be okay. Even at "label definition" when I print a test-pdf of Avery 8160 (I haven't changed this definition at all...it comes with LOG4OM) these labels are half-sized... What am I doing wrong?

THANKS in advance!
Ben (DL4DBM)