I think that I have covered everything

I have two tables

Parent Table

Child Table

I established the relationship in the DDT

Established to parentrelationship on the BO

Established the parent BO in the BO on the form.

Configured Childform.

Now, is the relationship code executing based off of the parentbo editing state? I have a listview on the parent form which is the child of a parent form.   

1. Open one of the SF samples that shows how to use a relationship (CRM sample application, ChildFormDialog sample, etc).
2. Post a quick sample of your basic implementation on this thread and I will correct your problem (within the basic sample...not your application code) so you can see what you are missing....this is faster than going back and forth.