package linux-headers-2.6.31-11-rt 2.6.31-11.154 failed to install/upgrade: subprocess installed post-installation script returned error exit status 2

[Enzo]

lsb_release -rd
Description: Ubuntu 10.04.1 LTS
Release: 10.04

package linux-headers-2.6.31-11-rt 2.6.31-11.154 failed to install/upgrade: subprocess installed post-installation script returned error exit status 2

expected post installation script to run successfully, instead it failed

ProblemType: Package
DistroRelease: Ubuntu 10.04
Package: linux-headers-2.6.31-11-rt 2.6.31-11.154
ProcVersionSignature: Ubuntu 2.6.32-23.37-generic 2.6.32.15+drm33.5
Uname: Linux 2.6.32-23-generic i686
NonfreeKernelModules: nvidia
Architecture: i386
Date: Thu Aug 26 08:03:26 2010
ErrorMessage: subprocess installed post-installation script returned error exit status 2
SourcePackage: linux-rt
Title: package linux-headers-2.6.31-11-rt 2.6.31-11.154 failed to install/upgrade: subprocess installed post-installation script returned error exit status 2