IIS Multithreading

I'm building a web application in classic ASP.  Someone uploads a bunch of files, then the files are processed in various ways on the server which is a very time consuming process, so I've written an ajax get progress checker that queries a page on the server and get the files progress.

Problem is when you upload a bunch of files and then query the server from the same client connection it has to wait until the first request is complete.

I don't know too much about IIS, is there any setting to change the way this works?  I'm using:

Microsoft Windows Server 2003 Standard Edition
Management Console 3.0
Version 5.2 (Build 3790 : Service Pack 2)

Thanks for any help

Tom

After a bit more digging:

<%@ EnableSessionState=False %>

Seems to work.  Hope someone else finds it useful!