Comment 8 for bug 570291

If I wait long enough after no response in trying to activate the buttons, the following message appears:

You are not allowed to modify the system configuration.

An error occurred while checking for authorizations: Did not receive a reply. Possible causes include: the remote application did not send a reply, the message bus security policy blocked the reply, the reply timeout expired, or the network connection was broken.
You may report this as a bug.