On my machine I am developing a .NET site. When I execute it,
everything runs perfectly. When I publish it (to my machine in a
folder so IIS can access it), I get a SQL error:

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

I know what the error means, but I don't understand why I'm getting
this on the published site and not when I run/execute the site from
Visual Studio 2005.

Any ideas?

Thanks!
Jeremy