Cannot run web debugger for VS.NET

[Andre S]

I have recently installed Visual Studio .NET and have been unable to
debug a web project on my local machine. I have only created a
standard web application and have a blank page. Running the
application without debugging works fine but if I start the debugger I
get the following error message:

Error while trying to run project: Unable to start debugging on the
web server. Server side-error occurred on sending debug HTTP request.

Make sure the server is operating correctly. Verify there are no
syntax errors in web.config by doing a Debug.Start Without Debugging.
You may also want to refer to the ASP.NET and ATL Server debugging
topic in the online documentation.

I have tried eveything suggested in all the KB articles and the other
posts including but not limited to:
* Ensuring all debug options are set in web.config, project
properties, iis, ie etc.
* Have ensured the virtual web has an application name
* made both my account and ASPNET member of Debuggers and VSDevelopers
* changed userName to SYSTEM in machine.config
* re-installed VS
* re-installed .Net Framework SP2
* run aspnet_regiis.exe -i and iisreset.exe
* Ensured ASPNET and my account to have the full permissions on all
the directories

I am running Windows 2000, VS.NET 2003, .NET Framework 1.1.4322, iis
5.0 and ie6.0 all teh latest SPs and Critical updates.

Any help wouild be greatly appreciated.

Thanks