Every time you change the database schema
(create a new table or add a new field), you must upgrade the DB.
This article explains how to do that.
See the steps below.
1: Open the application.
2: Right-click and select “Developer.“
3: Double click “Database Manager.“
4: Click “Actions“ from the menu and select “Read schema.“
5: After the scheme‘s reading, click “Actions“ again from the menu and select “Upgrade.“
6: After the scheme‘s upgrade, close the application.
These actions create the file data.db in the folder “RESOURCES.“
For more help, please see http://www.youtube.com/watch?v=C-YpHHflvPU