Scenario is something like this
i have an update panel which have a panel control and there are some controls in panel control. when page is loaded pane is invisible....AsyncFileUpload is also in this panel control....when user click on add button on page this update panel is asynchronously updated and panel control is made visible which in turn make all child controls visible
now if i select file in AsyncFileUpload it do not upload file...but if this panel is visible in first page load it works fine
any help on issue?