Thank you for the response.
When I first set up the db files, I chose an existing mysql db connection which is shown in Line 7. It appears in the Dreamweaver Application windows correctly with the appropriate tables, and in the root Connections folder.
After adding "Connections/localhost.php" in line 1, and trying to register, I get "Unknown column 'UserCity' in 'field list'".
Thanks for your patience.