Have not created a Parent - Child form situation in a long time. But, created a parent and child form this morning and added the same 2 Bo's to both of the  forms. Added a ChildFormDialog control. Set it up with the Child Form name. Then I added one of the Bo's as a child just making sure I remembered how to do that. Put a button on the parent form to load the child form and all seemed to work. I did not have any fields on the child form. Wanted to make sure I could get there and back without any error.