I am an old veteran of MM for VFP, but I am new to .NET. I've created a little application for learning. It's a simple address book with two business objects: address and names. Im using mmMaintenanceForm. So far so good. I can run the application and retrieve data. I can delete rows as well as save the names information (names bizobj is the primary.) The problem is I can't save any changes to the address data, and I can't seem to add a new record. I've registered address object as a child of names, and I've coded all the logic to respond to new and save events in the parent, but to no avail. Is there something I'm missing?