I'm trying to install OS X onto a virtual machine in Intrepid. But first, I need to get Ubuntu to read the DVD. Whenever I even try to navigate to it through Nautilus, I get:

DBus error org.freedesktop.DBus.Error.NoReply: 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.

Any ideas?