No. I have solved problem. The reason for it is because I selected Open Form in Add Mode when I create Switchboard. Now I change to Open Form in Edit Mode. It's working now. But I'm still thinking why I select Open Form in Add Mode does not allow me to save I added record. Do you have any idea?
I'm still not clear, I added records, and saved them, but why I open the database, the form was showing nothing, It just looks like I added records are all disappeared. Can you explain it.