Report Services installation problem

I've installed SQL Express 2005 on an XP Professional machine and I'm trying to configure Report Services. In Reporting Services Configuration Manager, all items are "green" except "Web Service Identity". The value is <machinename>\ASPNET and isn't configurable. I've searched the forums and followed the advice I've found to remove and reinstall .NET, but it hasn't helped. User ASPNET does exist on the machine with a local account, and IIS5 is running. SQL gurus, please help me figure out what to do! Thanks.The Web Service Identity is supposed to be read-only. If everything is grean RS should be already configured and good to go. What's not working?|||

I apologize - I didn't offer full details. I was frustrated!

Clicking "Apply" on the "Web Service Identity" dialogue results in an error. Clicking the link for details reveals this:

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ReportServicesConfigUI.WMIProvider.WMIProviderException: The account name is not valid. Specify an account in the form domain\alias.

at ReportServicesConfigUI.WMIProvider.RSReportServerAdmin.SetWebServiceIdentity(String applicationPool)

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The ASPNET user does exist however! I don't understand what's wrong. Thanks for your help.

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Not sure what's going on. It's seeme like there is something wrong with the ASPNET account. Is ReportServer vroot in IIS running under asp.net 2.0. Are any other web applications on that machine working OK?

|||That's a little over my head, I know little about IIS. Other "web pages" are accessible, such as http://localhost/printers and http://localhost/tsweb. This machine is dedicated to running SQL Server Express, so no other applications are running that I can test for web connectivity. Any direction you can point me in is greatly appreciated! Thanks again for your help.|||

1. Open up Internet Information Services applet in the Administrators group.

2. Right-click on the ReportServer node and choose Properties. Flip to the ASP.NET tab. What's the ASP.NET version?

|||The ASP.NET version is 2.0.50727. Thanks for helping me through this!