[Building Sakai] V 2.6.x Dropbox permissions

[Ciellie]

Hallo

When a student click on the dropbox tool in a course site the following message
appear "Alert: You do not have permission to view this folder." I checked and
the dropbox.own property is selected for the Student role in the
!site.template.course realm.

If I select the dropbox.maintain property for a Student as well the student can
see the droppbox but not just his own, but everyone else's also.

Thanx for the help
Ciellie