Logon failed for user '(null)'. Reason: Not associated with a trusted SQL Server connection

Hi there,
I don't know if this is an IIS or SQL Server issue. I have an
ASP.Net web application that is set up with Anonymous access turned off and
Windows Authentication turned on. The SQL 2000 server (on another machine)
is set up for Windows only authentication. The application won't logon to
SQL Server, as I get the error above. I have searched for this error and
most of the articles suggest activating mixed mode authentication. This is
at a customer site however, and they want the server left as it is. How do
I make it work as intended.


.

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