pbuilder fails while creating base environment: Failure trying to run: chroot /var/cache/pbuilder/build/7653/. mount -t proc proc /proc

Hi, I'm trying to create a pbuilder chroot environment from my KUbuntu 9.10 CD-ROM, but the process fails with the following message:
elgaton@catlover:~$ sudo pbuilder --create /var/cache/pbuilder/karmic.tgz --distribution karmic --mirror file:///media/cdrom0/
W: /home/elgaton/.pbuilderrc does not exist
I: Distribution is karmic.
I: Building the build environment
I: running debootstrap
/usr/sbin/debootstrap
I: Retrieving Release
I: Retrieving Packages
I: Validating Packages
I: Resolving dependencies of required packages...
I: Resolving dependencies of base packages...
I: Checking component main on file:///media/cdrom0...
I: Retrieving build-essential
I: Validating build-essential
I: Retrieving dpkg-dev
I: Validating dpkg-dev
I: Retrieving fakeroot
I: Validating fakeroot
I: Retrieving g++-4.4
I: Validating g++-4.4
I: Retrieving libstdc++6-4.4-dev
I: Validating libstdc++6-4.4-dev
I: Retrieving g++
I: Validating g++
I: Retrieving patch
I: Validating patch
W: Failure trying to run: chroot /var/cache/pbuilder/build/7653/. mount -t proc proc /proc
E: debootstrap failed
W: Aborting with an error
I: cleaning the build env
I: removing directory /var/cache/pbuilder/build//7653 and its subdirectories

I have searched for the error message on the Internet and no result produced a definitive solution.