Help!

I have a form with 2 tabbed pageframes on it. one contains a grid based on a table,
and the other a detail screen of the fields for the selected record in that grid.
For a variety of reasons, I'm clinging onto the scatter memvar variables as the
controlsource of the detail page's objects.

This is the problem...
Clicking on the Detail tab produces the right values in these objects. Programatically
changing them (the result of pressing a button) does not. Clicking on the individual fields
produces the correct values.
This is in spite of Thisform.Refresh on activation of the page.
P.S. I am activating the page with .....pagMyPage.SetFocus.

TIA