How can I activate a item that has been selected by a search on SAP???

When I ask for the selectedItem i get nothing, but If I ask for the selectedNode I get just the first column data as the selected one, but I have several rows with thats same data so If I try to activate that "selectedNode" goes to the first one regardless of the one thats selected already.

Any ideas?

Is there's a way to know the complete path of the line selected on the tree??