ASP.NET application set up as follows:
machine.config set to run as "SYSTEM"
web.config has impersonate="true", authentication
mode="None"
IIS set to use Anonymous Authentication (required since
site is public).

When the aspx page runs, it throws the following error:
System.UnauthorizedAccessException: Access to the
path "C:\WINNT\TEMP\s51yjw0f.dll" is denied.

In this error the path is always the same, but the dll
referenced seems to be a randomly-generated name.

If I change my IIS to use Integrated Windows
Authentication, the site works (but only within the
private network).

We have other sites configured this way, some work and
some exhibit this same behavior. Any clues?

Thanks in advance,
Tom