Gnome does not suspend when critical battery charge is reached.

Binary package hint: gnome-power-manager

When battery reaches critical charge percentage, gnome-power-manager does not suspend laptop.
I have tried adjusting settings in gconf-editor: Apps->gnome-power-manager->thresholds and continue not working.

ProblemType: Bug
Architecture: i386
Date: Thu Mar 11 00:47:37 2010
DistroRelease: Ubuntu 9.10
InstallationMedia: Ubuntu 9.10 "Karmic Koala" - Release i386 (20091028.5)
NonfreeKernelModules: wl
Package: gnome-power-manager 2.28.1-0ubuntu1.3
ProcEnviron:
 LANG=es_ES.UTF-8
 SHELL=/bin/bash
ProcVersionSignature: Ubuntu 2.6.31-20.57-generic
SourcePackage: gnome-power-manager
Uname: Linux 2.6.31-20-generic i686
XsessionErrors:
 (gnome-settings-daemon:2272): GLib-CRITICAL **: g_propagate_error: assertion `src != NULL' failed
 (gnome-settings-daemon:2272): GLib-CRITICAL **: g_propagate_error: assertion `src != NULL' failed
 (nautilus:2376): Eel-CRITICAL **: eel_preferences_get_boolean: assertion `preferences_is_initialized ()' failed
 (polkit-gnome-authentication-agent-1:2389): GLib-CRITICAL **: g_once_init_leave: assertion `initialization_value != 0' failed
 (gnome-power-manager:2386): Gdk-CRITICAL **: gdk_window_thaw_toplevel_updates_libgtk_only: assertion `private->update_and_descendants_freeze_count > 0' failed