Tree - create tree item

Hello,

have the following Context Node:

IncidentHeader

--descript

--event

--type

Collection Cardinality of IncidentHeader is 1..1. How can I create in the Outline-View a tree exacly like the Context Node. I tried it like this:

Tree (dataSource: IncidentHeader)

--TreeNode (dataSource: IncidentHeader)

--TreeItem1(dataSource: IncidentHeader, text: IncidentHeader.descript)

--TreeItem2(dataSource: IncidentHeader, text: IncidentHeader.event)

--TreeItem3(dataSource: IncidentHeader, text: IncidentHeader.type)

But it shows only one node with the text of the TreeItem3.

Regards,

Armin