I have a user control with an ITemplate. I have my user control dropped onto a page inside an UpdatePanel. Inside the template I have a button which I want to cause a full postback. When I add the button to the postback triggers of the UpdatePanel the UpdatePanel can't find the control and I get a runtime error of: A control with ID 'cmdUploadManual' could not be found for the trigger in UpdatePanel 'upManageManuals'. Is there anyway to build my user control so that controls within the template can be found?