IIS on local dev machine is blocking threads?

antic

Perch
I'm developing some ajax code, requiring multiple simultaneous xmlhttp calls to the server. Generally up to 3 at a time. I find that testing it on the live server (which is running "full" IIS under Windows Server) works well.

However my local IIS (windows XP version) doesn't handle simultaneous http calls well at all. Often only 1 call returns asynchronously, and the other ones block each other, only returning when the longest one is finished.

Is this just a limitation of the non-server version of IIS? It's supposed to support up to 10 connections, but doesn't seem to multithread to that extent at all.

What can I use instead, if I don't have a local version of Windows Server to run on a separate machine? Does the .NET 2005 built-in server operate better in this way than XP's IIS?
 
This is XP IIS? Yes it is feature limited but I thought it was 10 at a time not 1.
 
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