How to writing to a child table (1 Viewer)

I'm finally getting a chance to look into vb.net a bit. I've watched an msdn tutorial on connecting to an access db, and have a db connection to the simple two table accdb.

I tried to create a parent/child form, and have the parent part (tblCompany) reading and writing from the form just fine. However, the child grid will only read from the db, not write back to it. Do I need to do something else other than drag the grid from the datasource (I grabbed the tblContact that is under tblCompany)?

Thanks for any insight....I'm using VS2012 btw...