package gdm 2.30.2.is.2.30.0-0ubuntu5.1 failed to install/upgrade: subprocess installed post-removal script returned error exit status 1

[vamsi]

Binary package hint: gdm

i m trying to install theam packages in that process i found this. pls gimme steps to download and install theam packages for ubuntu 10.04

ProblemType: Package
DistroRelease: Ubuntu 10.04
Package: gdm 2.30.2.is.2.30.0-0ubuntu5.1
ProcVersionSignature: Ubuntu 2.6.32-30.59-generic 2.6.32.29+drm33.13
Uname: Linux 2.6.32-30-generic i686
AptOrdering:
 ubuntu-desktop: Purge
 gdm-guest-session: Purge
 gdm: Purge
 crossplatformui: Configure
Architecture: i386
Date: Mon Apr 18 16:54:54 2011
ErrorMessage: subprocess installed post-removal script returned error exit status 1
InstallationMedia: Ubuntu 10.04.1 LTS "Lucid Lynx" - Release i386 (20100816.1)
SourcePackage: gdm
Title: package gdm 2.30.2.is.2.30.0-0ubuntu5.1 failed to install/upgrade: subprocess installed post-removal script returned error exit status 1