ccsm crashed with ImportError in <module>()

[kulight]

Binary package hint: compizconfig-settings-manager

apport crash report

ProblemType: Crash
Architecture: amd64
DistroRelease: Ubuntu 9.04
ExecutablePath: /usr/bin/ccsm
InterpreterPath: /usr/bin/python2.5
NonfreeKernelModules: nvidia
Package: compizconfig-settings-manager 0.7.8-0ubuntu3
PackageArchitecture: all
ProcCmdline: /usr/bin/python /usr/bin/ccsm
ProcEnviron:
 LANG=en_US.UTF-8
 SHELL=/bin/bash
PythonArgs: ['/usr/bin/ccsm']
SourcePackage: compizconfig-settings-manager
Title: ccsm crashed with ImportError in <module>()
Traceback:
 Traceback (most recent call last):
   File "/usr/bin/ccsm", line 30, in <module>
     import pygtk
 ImportError: No module named pygtk
Uname: Linux 2.6.28-8-generic x86_64
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare