package ltsp-client-core (not installed) failed to install/upgrade: subprocess new pre-installation script returned error exit status 1

[sukhwinder singh]

i want to use thin client i am trying to installing ltsp package but failed.

ProblemType: Package
DistroRelease: Ubuntu 11.04
Package: ltsp-client-core (not installed)
ProcVersionSignature: Ubuntu 2.6.38-13.52-generic 2.6.38.8
Uname: Linux 2.6.38-13-generic i686
NonfreeKernelModules: nvidia
AptOrdering:
 ltsp-client-core: Install
 ltsp-client-core: Configure
 ltsp-client: Configure
Architecture: i386
Date: Mon Dec 5 10:41:48 2011
ErrorMessage: subprocess new pre-installation script returned error exit status 1
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release i386 (20110427.1)
SourcePackage: ltsp
Title: package ltsp-client-core (not installed) failed to install/upgrade: subprocess new pre-installation script returned error exit status 1
UpgradeStatus: No upgrade log present (probably fresh install)