Unable to create subweb with Front Page Server Extensions 2002

I am trying to set up a new testing server (running Windows Server 2003 R2) for remote debugging of my aspnet applications with Visual Studios 2005, but am encountering problems with Front Page Server Extensions.

When I first try to extend the site, either through IIS (with the Configure Server Extensions 2002 task) or the Microsoft SharePoint Administrator link, the IE browser seems to hang while trying to open fpadmdll.dll from the Microsoft SharePoint Administration site which was installed with fpse. However the extension appears to have been successful since if I try again I can now access the Site Administration Page after entering the username and password. Once here, I try to create a subweb specifying the same permission as for the parent web, but upon submitting it prompts me for the username and password then takes me to a page that says:

You are not authorized to view this page
You do not have permission to view this page using your current user account.
Please try the following:
• If you have another user account with a higher level of permission, click
your browser's Back button to try again using that account.
• If you believe you should be able to view this page, contact the Web site administrator.

If it’s a file permission issue, I’m not sure where it lies. I experimented with giving all users full control on the following files
C:\Program Files\Common Files\Microsoft Shared\web server extensions\50\isapi
C:\Program Files\Common Files\Microsoft Shared\web server extensions\50\_vti_bin

but that made no difference.


I’ve tried uninstalling and reinstalling Front Page Server Extensions 2002 but no change. Incidentally, I had used IIS 6.0 migration tool to copy the sites and contents over from another IIS 6.0 server (on Windows 2003 SP1), but that server was not Front Page extended so I don’t think the migration was the issue.

Can anyone help?
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Some additional information that may help...

When I try to run the Recalculate Server Extensions 2002 Web task from IIS, I get HTTP Error 404:

The page cannot be found
The page you are looking for might have been removed, had its name changed, or is temporarily unavailable.

The URL that appears in the address bar is http://server/_vti_bin/_vti_adm/fpadmdll.dll?page=recalc.htm

But no new records appear in the IIS log for after this attempt, nor does anything appear in the Application Event log.