package arno-iptables-firewall 1.9.2.k-4 failed to install/upgrade: subprocess installed post-installation script returned error exit status 2

Error message appeared (below):
"Failed to upgrade arno-iptables-firewall 1.9.2.k4"

Ubuntu Version 11.04

ProblemType: Package
DistroRelease: Ubuntu 11.04
Package: arno-iptables-firewall 1.9.2.k-4
ProcVersionSignature: Ubuntu 2.6.38-11.50-generic 2.6.38.8
Uname: Linux 2.6.38-11-generic i686
Architecture: i386
Date: Wed Oct 5 21:41:15 2011
ErrorMessage: subprocess installed post-installation script returned error exit status 2
InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release i386 (20101007)
PackageArchitecture: all
SourcePackage: arno-iptables-firewall
Title: package arno-iptables-firewall 1.9.2.k-4 failed to install/upgrade: subprocess installed post-installation script returned error exit status 2
UpgradeStatus: Upgraded to natty on 2011-09-25 (10 days ago)