Although i tried to setup the version hierarchy as described in the GreenHopper 5.9.x documentation i was not able to create parents and childs. Reading some question belonging to the same problem here many of them have the same problem, but some were able to use the "add" button. I searched for this function but without success.
Additionally although we created a sprint in GreenHopper it isn t reflected in JIRA, i expected it in the default issue field "GreenHopper Sprint".
Due to this reason at the moment the whole platform is not very useful regarding sprint organisation...