InfoPath Dev

I was unable to use the drop down since my list was on a different page or site, so i was only able to use a drop down from lists within the same site collection. I was able to get this to work by creating a rule to run when the combobox changes to set the value of the text box to the secondary data connection field "position" filtered ...

I have been researching this all day and I believe I am very close but I cannot quite get this to work.  I have a combobox which is populated from a secondary data connection.  The combobox contains employee names and is filtered to only show Active employees from a sharepoint list.  This part is working well.  next I would ...