Can't collapse, when children are a listview

[jeymo]

Hey,

i've run into a problem by developing a list with expandable children. Each parent has a different amount of children, so that I use a ListView in the "toolbar"-layout and fill it dynamically with data in an adapter.
Now when I expand a group everything works fine, but when I try to collapse, it seems as if the parent item looses his clicklistener, because no click is detected. The child list view doesn't have an itemclicklistener yet, so it couldn't be intercepted by it...
Do you have an idea?