Hi ,

         I am using DNN 3.2.2 in my website .. I tried to upload some new files to my website .i go to Admin ---> file manager then clicked the upload files link i got following error message . any idea !! pls help

" Invalid postback or callback argument. Event validation is enabled using <pages enableEventValidation="true"/> in configuration or <%@ Page EnableEventValidation="true" %> in a page. For security purposes, this feature verifies that arguments to postback or callback events originate from the server control that originally rendered them. If the data is valid and expected, use the ClientScriptManager.RegisterForEventValidation method in order to register the postback or callback data for validation. "

Thanks in advance

vibul