Sollution:
* Had to update settings with "Multi-Tuners" for VuDuo + tuner.
* Card-server to handle original card did for a strange reason not gain access to encrypted channels. ProSieben worked, so I got a clue there. I had a DM7020 which worked at once.
* New issue - to work on - My DM800HD is greyed out on "Select A Provider" and "Select A Channel". Also, under Media Player there no recordings to play. I suppose the issue is something with the WebUpdate. Work req. needed on this one