package am-utils 6.2+rc20110530-3ubuntu1 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1

just tried to install vnc by using this command : sudo apt-get install x11vnc vnc-java

ProblemType: Package
DistroRelease: Ubuntu 12.04
Package: am-utils 6.2+rc20110530-3ubuntu1
ProcVersionSignature: Ubuntu 3.2.0-24.39-generic 3.2.16
Uname: Linux 3.2.0-24-generic x86_64
NonfreeKernelModules: fglrx
ApportVersion: 2.0.1-0ubuntu7
AptOrdering: am-utils: Configure
Architecture: amd64
Date: Thu May 24 17:52:24 2012
ErrorMessage: subprocess installed post-installation script returned error exit status 1
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111012)
SourcePackage: am-utils
Title: package am-utils 6.2+rc20110530-3ubuntu1 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1
UpgradeStatus: Upgraded to precise on 2012-04-30 (24 days ago)