How do I get my "Shut Down"-button active?

[vwf <vwf@vulkor.net>]

Hello

After upgrading from squeeze to wheezy my "Shut Down" button is no
longer available from kdm and xfce (and restart, sleep and hybernate). I
reinstalled hal dbus pm-utils, I am in the powerdev-group. All pm-utils
(seem to) work from the command-line. But how do I get the buttons
active?

Thanks