Ubuntu – Ubuntu tweak not showing all the menus

Ubuntu-Tweak doesn't have the option
Startup which includes

• Session Manager
• Session Control
  and few other options are not there. I am running the latest version available to download. I remember having all those menus in lucid.

for a better difference comparison see the menus in the ubuntu tweak homepage http://ubuntu-tweak.com/ with mine….

how can I get these option back.

here is the error I get when I run Ubuntu Tweak from terminal

ERROR:dbus.proxies:Introspect error on :1.142:/com/ubuntu_tweak/daemon: dbus.exceptions.DBusException: org.freedesktop.DBus.Error.AccessDenied: Rejected send message, 1 matched rules; type="method_call", sender=":1.141" (uid=1000 pid=16550 comm="/usr/bin/python) interface="org.freedesktop.DBus.Introspectable" member="Introspect" error name="(unset)" requested_reply=0 destination=":1.142" (uid=0 pid=16560 comm="/usr/bin/python))

Update: I installed the same deb on another computer and that has nothing wrong. all the menus are listed fine.