ubuntu tweak won't let you enter compiz config ettings

[Scott Birk]

it says this mudule encountered an error while loading

[Ding Zhou (tualatrix)]

Please give me the error message. Do you use the Ubuntu Natty?

[Scott Birk (scooterbirk)]

Distribution: Ubuntu 11.04 natty
Application: Ubuntu Tweak 0.5.11
Desktop: gnome

Traceback (most recent call last):
  File "/usr/lib/python2.7/dist-packages/ubuntutweak/mainwindow.py", line 502, in setup_notebook
    page = module()
  File "/usr/lib/python2.7/dist-packages/ubuntutweak/modules/compiz.py", line 325, in __init__
    self.create_interface()
  File "/usr/lib/python2.7/dist-packages/ubuntutweak/modules/compiz.py", line 351, in create_interface
    self.launcher_autohide = UnityLauncherAutoHide(_('Make the launcher hide automatically after some time inactive'))
  File "/usr/lib/python2.7/dist-packages/ubuntutweak/modules/compiz.py", line 274, in __init__
    self.autohide_setting = CompizSetting(self.plugin, 'launcher_autohide')
  File "/usr/lib/python2.7/dist-packages/ubuntutweak/modules/compiz.py", line 149, in __init__
    self.__setting = self.__plugin.create_setting(key, target)
  File "/usr/lib/python2.7/dist-packages/ubuntutweak/modules/compiz.py", line 144, in create_setting
    return settings[key]
KeyError: 'launcher_autohide'