Display dataset data on a different form

I have an MDI app with multiple child forms. The main child form is like a summary form, and I would like to be able to make a selection in a treeview on a different form and have the specific table records display in Master / Detail form on the summary form.

I'm having trouble binding the controls, though. I've tried a number of methods of sending the selected node.text to the summary form's binding source, but at runtime nothing happens. I'm was trying to avoid any unnecessary code at this point so that a prototype could be ready by tomorrow. THis is a big holdup. Any help is appreciated.