[apport] gnochm crashed when the gnochm main window gave a screen flash after I double clicked a chm file

Binary package hint: gnochm

I upgraded ubuntu-edgy(version 6.10) to ubuntu-feisty(version 7.04) a few days ago.
When I run gnochm in gnome-terminal, the following message are shown:
"You do not have all of the required Python modules to run gnochm.
Check the gnochm README file for tips on how to fix this.
What follows is the error description highlighting the problematic module.

could not import gtk"

ProblemType: Crash
Date: Thu Feb 22 20:20:19 2007
DistroRelease: Ubuntu 7.04
ExecutablePath: /usr/bin/gnochm
InterpreterPath: /usr/bin/python2.5
Package: gnochm 0.9.9-0ubuntu1
ProcCmdline: /usr/bin/python /usr/bin/gnochm /home/aaron/Desktop/zope-scripting.chm
ProcCwd: /home/aaron
ProcEnviron:
 LANGUAGE=en_US.UTF-8
 LC_CTYPE=zh_CN.UTF-8
 PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/bin/X11:/usr/games
 LANG=en_US.UTF-8
 SHELL=/bin/bash
PythonArgs: ['/usr/bin/gnochm', '/home/aaron/Desktop/zope-scripting.chm']
SourcePackage: gnochm
Uname: Linux aaron-laptop 2.6.20-8-generic #2 SMP Tue Feb 13 05:18:42 UTC 2007 i686 GNU/Linux