upgrades failing to install upgrading from ubuntu 11.10 to 12.04

[Abhishek Dixit]

I was using 11.10 fresh install then on terminal I typed

    sudo do-release-upgrade


but it fails to upgrade to Ubuntu 12.04
here is the log
http://paste.ubuntu.com/1534446/

    Upgrading
    apport start/running

    Fetched 0 B in 0s (0 B/s)

    Exception during pm.DoInstall():  E:Could not perform immediate
configuration on 'passwd'. Please see man 5 apt.conf under
APT::Immediate-Configure for details. (2)

    Could not install the upgrades

    The upgrade has aborted. Your system could be in an unusable state. A
    recovery will run now (dpkg --configure -a).

    dpkg: dependency problems prevent configuration of libnih-dbus1:
     libnih-dbus1 depends on libnih1 (= 1.0.3-4ubuntu9); however:
      Version of libnih1 on system is 1.0.3-4ubuntu2.
     libnih-dbus1 depends on libc6 (>= 2.3.4); however:
      Package libc6 is not installed.
    dpkg: error processing libnih-dbus1 (--configure):
     dependency problems - leaving unconfigured
    Errors were encountered while processing:
     libnih-dbus1

    Upgrade complete

    The upgrade has completed but there were errors during the upgrade
    process.

    To continue please press [ENTER]



    === Command terminated with exit status 1 (Mon Jan 14 09:51:52 2013)
===-- 0:precise -- time-stamp -- Jan/14/13  9:53:44 --


after this I do a reboot and do
sudo aptitude clean
sudo dpkg --configure -a
and again try for
sudo do-release-upgrade
but I do not get any success and things are back to like the ones I posted
above.
Let me know what should I do to move from 11.10 to 12.04
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