Hi, guys I am having a big problem with the  Visual Studio 2010 FWRK-4.0 "FileUpLoad" control when used within a "Web User Control" I can not find where the fileupload become empty or reset to null. the following is what I have in my web user control named "UploaDocumentCtrl" which I call (<@Register) within an AjaxControlToolKit "TabContainer" control 
















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All works well to the point when I press the "ADD" Button to upload the file then the value contained in the "FilUpDoc" is lost become null I have checked the Page_Init, Page_Load and value it postback as null, like reseting the fileupload control to null value.

When I use the content from the web user control in a separate webform page it works fine, but I have to call it as a