package isc-dhcp-client 4.2.4-7ubuntu11 failed to install/upgrade

[proofNot]

It just says that there was a provlem while installing this package.

ProblemType: Package
DistroRelease: Ubuntu 14.04
Package: isc-dhcp-client 4.2.4-7ubuntu11
ProcVersionSignature: Ubuntu 3.13.0-22.44-generic 3.13.8
Uname: Linux 3.13.0-22-generic x86_64
NonfreeKernelModules: fglrx
ApportVersion: 2.14-0ubuntu1
Architecture: amd64
Date: Fri Apr 4 11:42:24 2014
DhclientLeases:

DuplicateSignature: package:isc-dhcp-client:4.2.4-7ubuntu11:
ErrorMessage:

InstallationDate: Installed on 2014-04-04 (0 days ago)
InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Beta amd64 (20140326)
ProcCmdline: BOOT_IMAGE=/boot/vmlinuz-3.13.0-22-generic root=UUID=07a44169-106f-4912-80a0-49ff4c8daa98 ro quiet splash vt.handoff=7
SourcePackage: isc-dhcp
Title: package isc-dhcp-client 4.2.4-7ubuntu11 failed to install/upgrade
UpgradeStatus: No upgrade log present (probably fresh install)