Ground plane erstellen, aber wie?

Thank-you Peter!
reason for writing in German was to quote the german dialogs. I'll try to translate them here.

• First I click on 'routing' and choose 'ground plan' (Massefüllung)

• subdialog window opens offering:
  Copperplan (top/bottom)
  Groundplan (top/bottom)
  Seed for Groundplan
  ... etc

• clicking Seed for Groundplan a new window opens telling how to choose a seed
  (already done before by highlighting an element with a ground connection or
  alternativ by highlighting a ground track)

• clicking 'Routing' 'Groundplan' same dialog as for clicking 'Seed for Groundplan' opens
  on the bottom one can choose 'OK and Copperfiing' 'OK' 'break' => no 'OK and Groundplan' to choose here?!

• clicking 'OK and Copperfilling' fritzing does excact this: producing a copperplan whith no ground connections Image may be NSFW.
  Clik here to view.

What do I missing or doing wrong?