If you encounter the problem, that KIso tells you, that you have to start KIso as root first, even if
you already did, please check that your /etc/sudoers contains the following lines:

# Defaults specification
Defaults targetpw
%users ALL=(ALL) ALL

# User privilege specification
root    ALL=(ALL) ALL

ALL ALL=NOPASSWD:/bin/mount -o loop* -t iso9660*,/bin/umount /home/*/.kisotmp/*
