Web Portal Customizations

I am modifying the page I attached through Web Designer. (1IM 9.0 LTS)

I inserted the following "Expression for display value" "UID_Person IN (SELECT po.UID_Person FROM Org o LEFT JOIN PersonInOrg po ON o.UID_Org = po.UID_Org WHERE o.Ident_Org = 'Manager Consulenti')" . If I run it in Object Browser it works.

In the "Component to edit a value" I chose "VI_Edit_LimitedValues". But when I click on the arrow in the WEB page nothing appears. Do you have an example of how to populate the information to be displayed?