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Hi all, I have some problems in building my customized distro. I tried a lot of times, but I got always the same error:

Burn Failed.

I have a lot of space (12,5Gb) and I make some iso (from different Ubuntu's CDs), but I wasn't able to make my distro.
This is my build.log file:

Starting CD remastering on sab giu 16 16:11:24 CEST 2007
Customization dir=/tmp/tmp.ZvSHUA9486
Mounting ISO image...
Mounting SquashFS image...
Copying data to remastering root directory...
Copying resolv.conf
Copying local apt cache, if available
Copying customization files...
Mounting X11 sockets directory to allow access from customization environment...
Creating user directory...
Copying X authorization file to chroot filesystem...
xauth: creating new authority file /root/.Xauthority
xauth: creating new authority file /home/crazyhorse/.Xauthority
Running customization script...
Get:1 http://security.ubuntu.com feisty-security Release.gpg [191B]
Get:2 http://security.ubuntu.com feisty-security Release [50.9kB]
Get:3 http://archive.ubuntu.com feisty Release.gpg [191B]
Get:4 http://archive.ubuntu.com feisty Release [57.2kB]
gpgv: Signature made Tue Jun 12 22:28:59 2007 UTC using DSA key ID 437D05B5
gpgv: Good signature from "Ubuntu Archive Automatic Signing Key <email address hidden>"
gpgv: Signature made Tue Apr 17 18:20:13 2007 UTC using DSA key ID 437D05B5
gpgv: Good signature from "Ubuntu Archive Automatic Signing Key <email address hidden>"
Get:5 http://security.ubuntu.com feisty-security/main Packages [33.9kB]
Get:6 http://archive.ubuntu.com feisty/main Packages [1007kB]
Get:7 http://security.ubuntu.com feisty-security/restricted Packages [6350B]
Get:8 http://security.ubuntu.com feisty-security/main Sources [6610B]
Get:9 http://security.ubuntu.com feisty-security/restricted Sources [955B]
Get:10 http://archive.ubuntu.com feisty/restricted Packages [7628B]
Get:11 http://archive.ubuntu.com feisty/main Sources [293kB]
Get:12 http://archive.ubuntu.com feisty/restricted Sources [1710B]
Fetched 1466kB in 9s (159kB/s)
Reading package lists...
E: Couldn't make mmap of 16777216 bytes - mmap (19 No such device)
W: Unable to munmap
E: The package lists or status file could not be parsed or opened.
apt-get update failed, error=100
Unmounting X11 sockets directory...
Running customization script failed, error=1
Trying to unmount X11 sockets directory (ignore errors)...
Checking if unmounting directory /home/crazyhorse/tmp/remaster-root/tmp/.X11-unix is necessary...
/home/crazyhorse/tmp/remaster-root/tmp/.X11-unix is not a mountpoint
Directory /home/crazyhorse/tmp/remaster-root/tmp/.X11-unix not mounted.
Checking if unmounting directory /home/crazyhorse/tmp/remaster-root/lib/modules/2.6.20-15-generic/volatile is necessary...
/home/crazyhorse/tmp/remaster-root/lib/modules/2.6.20-15-generic/volatile is not a mountpoint
Directory /home/crazyhorse/tmp/remaster-root/lib/modules/2.6.20-15-generic/volatile not mounted.
Checking if unmounting directory /home/crazyhorse/tmp/remaster-root/proc is necessary...
/home/crazyhorse/tmp/remaster-root/proc is a mountpoint
Processes still using mount point /home/crazyhorse/tmp/remaster-root/proc:

                     USER PID ACCESS COMMAND
/home/crazyhorse/tmp/remaster-root/proc:
                     root 4758 f.... acpid
                     root 4902 f.... dd
                     haldaemon 4931 f.... hald
                     root 5070 F.... Xorg
                     crazyhorse 9011 f.... firefox-bin

Unmounting directory /home/crazyhorse/tmp/remaster-root/proc...
Checking if unmounting directory /home/crazyhorse/tmp/remaster-root/sys is necessary...
/home/crazyhorse/tmp/remaster-root/sys is a mountpoint
Processes still using mount point /home/crazyhorse/tmp/remaster-root/sys:

                     USER PID ACCESS COMMAND
/home/crazyhorse/tmp/remaster-root/sys:
                     root 1 ....m init
                     root 2699 ....m udevd
                     root 3858 f...m ipw3945d-2.6.20
                     root 4476 ....m getty
                     root 4477 ....m getty
                     root 4479 ....m getty
                     root 4481 ....m getty
                     root 4483 ....m getty
                     root 4484 ....m getty
                     root 4758 ....m acpid
                     root 4862 ....m syslogd
                     root 4902 ....m dd
                     klog 4904 ....m klogd
                     messagebus 4919 ....m dbus-daemon
                     haldaemon 4931 ....m hald
                     root 4932 ....m hald-runner
                     haldaemon 4938 ....m hald-addon-acpi
                     root 4939 ....m hald-addon-cpuf
                     haldaemon 4946 ....m hald-addon-keyb
                     haldaemon 4957 ....m hald-addon-keyb
                     haldaemon 4960 ....m hald-addon-keyb
                     haldaemon 4963 ....m hald-addon-keyb
                     haldaemon 4984 ....m hald-addon-stor
                     root 4991 ....m dhcdbd
                     root 5000 ....m NetworkManager
                     avahi 5012 ....m avahi-daemon
                     avahi 5013 ....m avahi-daemon
                     root 5020 ....m NetworkManagerD
                     root 5030 ....m system-tools-ba
                     root 5031 ....m dbus-daemon
                     root 5055 ....m gdm
                     root 5056 ....m gdm
                     root 5070 F...m Xorg
                     cupsys 5095 ....m cupsd
                     root 5123 ....m hpiod
                     hplip 5142 ....m python
                     root 5244 ....m hcid
                     daemon 5290 ....m atd
                     root 5298 ....m cron
                     crazyhorse 5388 ....m x-session-manag
                     crazyhorse 5428 ....m ssh-agent
                     crazyhorse 5431 ....m dbus-launch
                     crazyhorse 5432 ....m dbus-daemon
                     crazyhorse 5434 ....m gconfd-2
                     crazyhorse 5437 ....m gnome-keyring-d
                     crazyhorse 5439 ....m gnome-settings-
                     crazyhorse 5452 ....m sh
                     crazyhorse 5453 ....m esd
                     crazyhorse 5457 ....m metacity
                     crazyhorse 5460 ....m gnome-panel
                     crazyhorse 5461 ....m nautilus
                     crazyhorse 5469 ....m bonobo-activati
                     crazyhorse 5470 ....m gnome-volume-ma
                     crazyhorse 5473 ....m gnome-vfs-daemo
                     crazyhorse 5475 ....m update-notifier
                     crazyhorse 5480 ....m nm-applet
                     crazyhorse 5481 ....m gnome-cups-icon
                     crazyhorse 5482 ....m gnome-power-man
                     crazyhorse 5497 ....m mapping-daemon
                     crazyhorse 5499 ....m trashapplet
                     crazyhorse 5545 ....m mixer_applet2
                     crazyhorse 5596 ....m gnome-screensav
                     crazyhorse 5629 ....m gnome-terminal
                     crazyhorse 5634 ....m gnome-pty-helpe
                     crazyhorse 5635 ....m bash
                     root 5661 ....m mount.ntfs-3g
                     root 5670 ....m mount.ntfs-3g
                     root 5676 ....m mount.ntfs-3g
                     root 5681 ....m mount.ntfs-3g
                     root 5685 ....m mount.ntfs-3g
                     crazyhorse 5713 ....m kdeinit
                     crazyhorse 5718 ....m dcopserver
                     crazyhorse 5721 ....m klauncher
                     crazyhorse 5723 ....m kded
                     crazyhorse 5729 ....m knotify
                     crazyhorse 5732 ....m artsd
                     dhcp 5790 ....m dhclient
                     crazyhorse 5836 ....m notification-da
                     crazyhorse 5936 ....m kio_file
                     root 6796 ....m artsd
                     crazyhorse 9011 ....m firefox-bin
                     crazyhorse 9370 ....m totem-plugin-vi
                     crazyhorse 9428 ....m uck-gui
                     crazyhorse 9490 ....m uck-gui
                     crazyhorse 9491 ....m tee
                     root 9492 ....m bash

Unmounting directory /home/crazyhorse/tmp/remaster-root/sys...
Checking if unmounting directory /home/crazyhorse/tmp/remaster-root/dev/pts is necessary...
/home/crazyhorse/tmp/remaster-root/dev/pts is not a mountpoint
Directory /home/crazyhorse/tmp/remaster-root/dev/pts not mounted.
Checking if unmounting directory /home/crazyhorse/tmp/squashfs-source is necessary...
mountpoint: /home/crazyhorse/tmp/squashfs-source: No such file or directory
Directory /home/crazyhorse/tmp/squashfs-source not mounted.
Checking if unmounting directory /home/crazyhorse/tmp/iso-source2 is necessary...
mountpoint: /home/crazyhorse/tmp/iso-source2: No such file or directory
Directory /home/crazyhorse/tmp/iso-source2 not mounted.
Trying to unmount X11 sockets directory (ignore errors)...
Checking if unmounting directory /home/crazyhorse/tmp/remaster-root/tmp/.X11-unix is necessary...
/home/crazyhorse/tmp/remaster-root/tmp/.X11-unix is not a mountpoint
Directory /home/crazyhorse/tmp/remaster-root/tmp/.X11-unix not mounted.
Checking if unmounting directory /home/crazyhorse/tmp/remaster-root/lib/modules/2.6.20-15-generic/volatile is necessary...
/home/crazyhorse/tmp/remaster-root/lib/modules/2.6.20-15-generic/volatile is not a mountpoint
Directory /home/crazyhorse/tmp/remaster-root/lib/modules/2.6.20-15-generic/volatile not mounted.
Checking if unmounting directory /home/crazyhorse/tmp/remaster-root/proc is necessary...
/home/crazyhorse/tmp/remaster-root/proc is not a mountpoint
Directory /home/crazyhorse/tmp/remaster-root/proc not mounted.
Checking if unmounting directory /home/crazyhorse/tmp/remaster-root/sys is necessary...
/home/crazyhorse/tmp/remaster-root/sys is not a mountpoint
Directory /home/crazyhorse/tmp/remaster-root/sys not mounted.
Checking if unmounting directory /home/crazyhorse/tmp/remaster-root/dev/pts is necessary...
/home/crazyhorse/tmp/remaster-root/dev/pts is not a mountpoint
Directory /home/crazyhorse/tmp/remaster-root/dev/pts not mounted.
Checking if unmounting directory /home/crazyhorse/tmp/squashfs-source is necessary...
mountpoint: /home/crazyhorse/tmp/squashfs-source: No such file or directory
Directory /home/crazyhorse/tmp/squashfs-source not mounted.
Checking if unmounting directory /home/crazyhorse/tmp/iso-source2 is necessary...
mountpoint: /home/crazyhorse/tmp/iso-source2: No such file or directory
Directory /home/crazyhorse/tmp/iso-source2 not mounted.
X Error: BadDevice, invalid or uninitialized input device 169
  Major opcode: 145
  Minor opcode: 3
  Resource id: 0x0
Failed to open device
X Error: BadDevice, invalid or uninitialized input device 169
  Major opcode: 145
  Minor opcode: 3
  Resource id: 0x0
Failed to open device

Anyone can help me? Thanks a lot in advance! :)