Updateprogessbar is not working when Setting AssociatedUpdatePanelID?

Question

I have two updatepanel and a progressbar on the page. If I set the AssociatedUpdatePanelID, then progressbar is not working, without setting AssociatedUpdatePanelID progress

Answer 1

AssociatedUpdatePanelID property in the UpdateProgress control will not work if the event that triggered the UpdatePanel is also external.