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Asked: 2026-05-11T03:38:22+00:00

I am having an odd problem with my SQL Server express 2005 DB. It

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I am having an odd problem with my SQL Server express 2005 DB. It is running on a 2003 server. With VS2005 I can access the db without any problem. But when I try and run the application I get:

 Cannot open user default database. Login failed.  Login failed for user 'NT AUTHORITY\NETWORK SERVICE'......... .ldf may be incorrect.

I have ensured that NETWORK SERVICE has full access to the website folder and all it sub folders.

I have noticed that when I look at the properties of App_Data it has a gray tick on the read only. The .MDF file is not read only but I can not remove this gray tick. I have tried just clicking it till its gone and applying changes, I have tried ATTRIB . -r but nothing seems to change it.

I am very confused.

Jon

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1 Answer

  1. The difference isn’t related to ACLs on the folder but to that fact that the security context is mapped to a user in the DB. Your DB will have a mapping for your user account probably to dbo.

    If the Network Service account is going to use the DB you need to create a user in the db to map to Machine account.

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