@ruskie thanks, I changed owner /etc.fcron.conf to root.fcron and chmod 644.
I also had to
mkdir -p /scratchbox/tools/bin
ln -s /usr/bin/vi /scratchbox/tools/bin/vi
so that I could use fcrontab -e to add crontab-file for root
I know use it to sync my calendar from my funabol-server every 10 min with syncevolution.