Scan of the free@home components

Hi all!
I’m new here and just starting to setup OpenHAB with my Busch Jäger installation. So far it works fine! Thanks a lot for all the efforts!
sorry for my broken english.
I am trying to install the binding for free@home.
I got so far that I see the “free@home Bridge” in the “Thing” menu. And the “free@home Bridge” is online.
But it is not possible to do a scan for the objects.

When I remove the “Thing free@home Bridge” I see the button “Scan”, but when I change IP and PW the button is no longer visible.

Does anyone have an idea ?