Displaying an Address

I am trying to make a form similar to the CustTable form. I have created a form based off a table also similar to CustTable -Fields, Field Groups, all the works. However when I have created my customers and I go on the next tab to view the address of the customer selected, it displays the info in the individual address fields - street, city etc but not in the AddressDisplay field. How come? Am I missing something?

I finally got it to work. I had to override the modified method of the Street, City, County… on the datasource of the form.