This is great.  Thanks so much for all your hard word on this.  Question....when working on beginning lesson 7 part 1, you use the built in navigation form.  Using the same file taken back and forth to work, when I create a navigation form at home I am able to drop new items into it but at work I get an error even when trying to start the navigation form.  I don't remember the error message because it goes away when I click ok but when I try to drop an item into the New section, I get a message saying that I cannot add change or delete.