Ubuntu fails to upgrade using the "update-manager -d" command

[Moses Bermea]

Everytime I run "update-manager -d" to upgrade to 14.04 from 12.04.4 it fails. I have Ubuntu 12.04.4 LTS and Windows 7 Home Premium 64-bit dualbooting.

lsb_device -rd output:
Description: Ubuntu 12.04.4 LTS
Release: 12.04

apt-cache policy update-manager output:
update-manager:
  Installed: 1:0.156.14.13
  Candidate: 1:0.156.14.13
  Version table:
 *** 1:0.156.14.13 0
        500 http://mirror.lstn.net/ubuntu/ precise-updates/main amd64 Packages
        100 /var/lib/dpkg/status
     1:0.156.14.5 0
        500 http://mirror.lstn.net/ubuntu/ precise-security/main amd64 Packages
     1:0.156.14 0
        500 http://mirror.lstn.net/ubuntu/ precise/main amd64 Packages

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: update-manager 1:0.156.14.13
ProcVersionSignature: Ubuntu 3.11.0-15.25~precise1-generic 3.11.10
Uname: Linux 3.11.0-15-generic x86_64
NonfreeKernelModules: fglrx
ApportVersion: 2.0.1-0ubuntu17.6
Architecture: amd64
Date: Mon Jun 2 06:48:21 2014
GsettingsChanges:
 com.ubuntu.update-manager first-run false
 com.ubuntu.update-manager launch-time 1401709455
 com.ubuntu.update-manager window-height 500
 com.ubuntu.update-manager window-width 600
InstallationMedia: Ubuntu 12.04.4 LTS "Precise Pangolin" - Release amd64 (20140204)
MarkForUpload: True
PackageArchitecture: all
ProcEnviron:
 TERM=xterm
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: update-manager
Symptom: ubuntu-release-upgrader-core
UpgradeStatus: Upgraded to precise on 2014-06-02 (0 days ago)
VarLogDistupgradeTermlog: