error on build mount

con una imagen kubuntu-6.10
admin@sistemas4:~$ /usr/bin/customize-cd-gui
Preparing build environment...
Running build process...
Starting CD remastering on vie oct 27 11:49:49 ART 2006
Customization dir=/tmp/tmp.BD1K3w
Mounting ISO image...
rmdir: `/home/admin/tmp/iso-source2': Device or resource busy
Failed to remove ISO mount directory /home/admin/tmp/iso-source2, error=1
Mounting SquashFS image...
mount: wrong fs type, bad option, bad superblock on /dev/loop4,
       missing codepage or other error
       In some cases useful info is found in syslog - try
       dmesg | tail or so

Cannot mount /home/admin/tmp/remaster-iso/casper/filesystem.squashfs in /home/admin/tmp/squashfs-source, error=32
Trying to unmount X11 sockets directory (ignore errors)...
umount: /home/admin/tmp/remaster-root/tmp/.X11-unix: not found
Trying to unmount directory /home/admin/tmp/iso-source2 (ignore errors)...
Trying to unmount directory /home/admin/tmp/remaster-root/lib/modules/*/volatile (ignore errors)...
umount: /home/admin/tmp/remaster-root/lib/modules/*/volatile: not found
Trying to unmount directory /home/admin/tmp/remaster-root/proc (ignore errors)...
umount: /home/admin/tmp/remaster-root/proc: not found
Trying to unmount directory /home/admin/tmp/remaster-root/sys (ignore errors)...
umount: /home/admin/tmp/remaster-root/sys: not found
Trying to unmount directory /home/admin/tmp/remaster-root/dev/pts (ignore errors)...
umount: /home/admin/tmp/remaster-root/dev/pts: not found
admin@sistemas4:~$