What have I done wrong here?

FileName = GETFILE('DBF') 
USE (FileName) IN 2 ALIAS MyFile 

After opening this table in the load area of a form, a user can click on a map in the form.
The click event calls a details form. The details form opens fine. I have option button choices on the details form. When the buttons are clicked values are not replaced in the fields. Furthermore, modify memo does not work.

If I hard code a table to the details form everything works fine, so I think the code above is causing the trouble.

Any ideas?