I am working with the demo projects and the first time I upload an item everything works fine but the second time always gives the following long error message. I am using the Framework 2.0-Csharp-MicrosoftAjax demo.

 

 

I have seen this quite a bit with AJAX and having to register events with the ClientScriptManager but this seems strange when the demos give me this error.

 

I am also getting this as an error in my own project EACH time a file is uploaded. The progress bar shows up correctly so I know that I have the module in the right place in web.config.