DataGrid+XML! Cool, now what was selected?

I have a DataGrid in my scene and I’ve figured out how to populate it with XML using AS3.
The only thing I can’t figure out is how to determine which element has been clicked on.
It’s not an editable grid, I just want to handle when someone selects a row in the grid and display that rows elements.
Thanks for ANY help. I’m so close.

myDataGrid.addEventListener(SELECT, mySelectHandler);
returns the error...
ReferenceError: Error #1065: Variable SELECT is not defined.

myDataGrid.addEventListener(Event.CHANGE, mySelectHandler);
returns the error...
TypeError: Error #1034: Type Coercion failed: cannot convert[email protected] to
	at fl.controls::SelectableList/fl.controls:SelectableList::handleCellRendererClick()
	at fl.controls::DataGrid/fl.controls:DataGrid::handleCellRendererClick()