Loopback.dll

Don't worry, that comment is a left over. At the end we have choose to release it as source so it's almost ready to work.

The only problem is if your server is configured to use Asp.Net 1.1 instead of 2.0, then as pointed in viewtopic.php?f=10&t=8313#p21755 you need to do a little correction and then it should work OK. (it was due to a late minute change and then it wasn't tested again with Asp.Net 1.1)

You can try to edit the core/connector/asp/ErrorHandler/FileUpload.asp file and change the throwError function this way (in the next release it will be easier).
Now it should inform properly of the reason of the problem.

   function throwError(number, text, debugText)
      If (base.SkipError(number)) Then Exit Function

'      response.clear
      Dim sFileName, sResponse
      sFileName = oCKFinder_Factory.Registry.Item("FileUpload_fileName")

         'Response.ContentType   = "text/plain"
         response.write "<scr" & "ipt type=""text/javascript"">"
         sResponse = sResponse & "CKFinder connector for classic ASP. The connector is in Debug Mode." & vblf
         sResponse = sResponse & "In order to use the connector you'll have to set CKFinder_Debug = false." & vblf
         sResponse = sResponse & "Response from the connector (including debugging messages):" & vblf
         sResponse = sResponse & "                                                                        " & vblf
         sResponse = sResponse & "Response Number: " & number & vblf
         sResponse = sResponse & "FileUpload_fileName: " & sFileName & vblf
         sResponse = sResponse & "Response Text: " & text & vblf
         sResponse = sResponse & "Debug Text: " & debugText & vblf

         sResponse = Replace( sResponse, "'", "\'")
         sResponse = Replace( sResponse, vbcr, "")
         sResponse = Replace( sResponse, vblf, "\n' + " & vbcr & "'")
         sResponse = Replace( sResponse, "</", "<\/")

         response.write "alert('" & sResponse & "');"
         response.write "</scr" & "ipt>"

      response.end
   end Function

If you look at the code that I've pasted previously, it's just that (I've removed the condition that referenced the debug variable because it's a little tricky to use).

So the question is: Why doesn't the asp.net work?

now go to the config.asp file and change the image componente from Auto to Asp.Net, that way it will force it and we'll see the error generated in the asp.net side (probably we'll need to change the asp.net to enable debugging, but that will be later).

Meanwhile, you can try to create a simple aspx file with this content

<%
   response.write("Hello")
%>

and try to load it in your browser to verify if asp.net is enabled.