Report manager HTTP status 400: Bad Request

I am having trouble to access Report Manager on a fresh SQL Reporting Services install on Win 2003, SQL 2000 SP3a machine. /ReportServer works fine, I've created a Virtual Directory /OnlineReports to allow anomynous access but /Reports doesn't work. So I can't add IUSR to the folder I need anomymous access on. Can somebody please help?

Thanks in advance.

Is Report Manager configured correctly? Can you look in RSWebApplication.config and see what ReportServerUrl is set to?|||

Yes, here's what it shows <ReportServerUrl>http://www.domain.com/ReportServer</ReportServerUrl>

www.domain.com/ReportServer works but www.domain.com/Reports doesn't.

Thank you.

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Well, now I have a different error. It said The request failed with HTTP status 401: Unauthorized when I go to www.domain.com/Reports. I log in as Administrator and it still said I am unauthorized. Do I have to uninstall and reinstall to get this working?

Thank you.

|||Add a DWORD entry called DisableLoopbackCheck to
HKLM\System\CurrentControlSet\Control\Lsa. Setting this key to a value of 1 fixed the issue.