ASP.NET - How to get values from template column in gridview

hi frds

i took 4 controls as template control in gridview.
such as checkbox     -- autoback (true)
            dropdownlist
            dropdownlist
            textbox 

all controls are loaded in page load event ,

but when i check checkbox automatically all controls are disappered 

what should i do to restore controls with data that loaded .

Balaji, Can you verify whether you are loading all the controls you specified in !PostBack?