Hello,
as Borislav already stated you don't have to set the ControlSource again and again and again, set them once in the designer and finished ..
you're probably struggling with the Pageframe refresh bug/"by design feature" :) ...,you have to place a
THIS.Refresh()
line into every single page's Activate event, otherwise the content on the page isn't refreshed correctly when you switch to it..
Regards
Christian