Copy/paste from programmer to fixture editor

Tried it first time yesterday and that didn't seem to work....
Wanted to make my pan/tilt offsets.
First i selected 1 thru 10 and made pan adjustments so i had them all show up in the programmer. I then marked the 'pan'-cells from fixtures 1 thru 10 and copied.
My goal was to paste them in the offset cells of 1 thru 10 in the editor. But that's not working. So i finally had to do it manually.
Any hints?