I have placed the code from the multiple-files-upload.aspx example.

 I cut-n-paste the asp code into my upload.aspx and cut-n-paste the script into my upload.aspx.cs

 1. In Design View, the Uploader1 control shows an error:

      'Upload Multiple Files (Max 1-M)' could not be set on property 'InsertText'.

 2. SampleUtil errors so I commented it out like so:
     
      //SampleUtil.SetPageCache();

 3. I set the file path to our web folder like so:

 
args.CopyTo(Server.MapPath("~\\temp\\") + args.FileName);

 And it works fine however,

 Q. Why do I have files like this: persisted.b7d1e76f-2876-422f-ae51-689a4afa371f.crownPoint640x480.jpg.resx?

 4. The "TempDirectory" property default is ~/UploaderTemp.

 Q. Should this be set to our ~/temp directory?

Unlike standard ASP.NET HtmlInputFile control, AJAX Uploader does not read the entire uploaded file into memory. It streams the data into a temporary file while the data is received. For this reason, you must specify a temporary file location. You should ensure that the ASPNET user (NetworkService in Windows Server 2003) has read/write permission to this specified folder.