suspend fluxbox wheezy not authorized

vi /etc/polkit-1/localauthority/50-local.d/org.freedesktop.suspend.pkla

....
[Re-enable suspend by default in upower]
Identity=unix-user:*
Action=org.freedesktop.upower.suspend
ResultActive=yes
....

add ~/.fluxbox/startup

....
ck-launch-session xfce4-power-manager --no-daemon &
....