No access to usb-media by kaffeine or amarok

I have installed OS 11.2 A, and the same problem occurs on OS 11.1 RC1 with KDE 4.1.3 or KDE 4.1.81.

When I try to add a file to my playlist in kaffeine or amarok the file-selector pops up, then it is not possible to enter usb-media devices. Instead a message is displayed, which I would translate as follows:

Media administration/management of KDE has not been started!

How do I get this started or what else is to do?

Thanks in advance for any help.

Kind regards.