I have used nested GridView controls in nested UpdatePanels to show data heirarchically and to work asynchronously......

half of the work is done .... the data is shown as intended but none of the events of both the outer and inner GridViews donot work.....i have set all the neccessary properties to show paging and perform sorting........but when i click on page index or when i want to sort inner or outer Grid.....a message box is displayed while showing "the PageIndexChanging " or "Sorting" event is not handled for paging and sorting respectively....

can some body help....

thx