login failed for user (null)

From: "mecn" <mecn2002@xxxxxxxxx>
Date: Tue, 13 Nov 2007 12:33:21 -0500

Hi

I have .net app got this error below,
Connection failed: sqlstate:28000 sql server error: 18452 login failed for
user(null). reason: not associated with a trusted SQL server connection

Any ideas

thanks

.

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