InfoPath Dev

I should add that I'm populating the dropdown menu with the same secondary data source. The selected option's value is then used to match a node in the secondary data source so I can retrieve the rest of the associated data.

I'm having some major problems trying to do what seems like a simple task: populate fields in the main data source with values from a secondary data source based on the current dropdown menu selection. I'm using SP1 and VB.NET. I first tried what I thought would be the easiest route: creating a rule set's a field's value when the field ...