I tried the 1.1 examples and it work perfectly here. I checked the 1.1 web.config files. They are correct.

 

I think we may have misunderstanding.

 

After unloading the controls to users, you need to use.CopyTo to process the uploaded files. Otherwise uploader will remove the temp files. In the default examples, this method is commented out.

 

    void Uploader_FileUploaded(object sender, UploaderEventArgs args)
    {
        Uploader uploader = (Uploader)sender;
        InsertMsg("File uploaded! " + args.FileName + ", " + args.FileSize + " bytes.");

        //Copys the uploaded file to a new location.
        //args.CopyTo(path);
        //Opens the uploaded file's data stream.
        //System.IO.Stream data = args.OpenStream();
    }