form update does not happen

Hi,

I am using PL 44 , 2005 B. in user defined form, whenever I change the value of combobox or change the value of a column , it does not reflect on the screen immediately. If I minimize it and again activate the form, the value gets refreshed. or, I have to capture the value change or lost focus and apply a form.update. Is it a product bug?

regards,

Binita