Problem with Entity Framework : "The underlying provider failed on Open"

Posted by pokrate on Stack Overflow See other posts from Stack Overflow or by pokrate
Published on 2010-05-16T19:35:34Z Indexed on 2010/05/16 19:40 UTC
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ASP.NET

Hi, When I try to insert a record, I get this error : The underlying provider failed on Open. This error occurs only with IIS and not with VWD 2008's webserver. In the EventViewer I get this Application Error : Failed to generate a user instance of SQL Server due to a failure in starting the process for the user instance. The connection will be closed. [CLIENT: ]

<add name="ASPNETDBEntities" connectionString="metadata=res://*/Models.FriendList.csdl|res://*/Models.FriendList.ssdl|res://*/Models.FriendList.msl;provider=System.Data.SqlClient;provider connection string=&quot;Data Source=.\SQLEXPRESS;AttachDbFilename=|DataDirectory|\ASPNETDB.MDF;Integrated Security=True;Connect Timeout=30;User Instance=True;MultipleActiveResultSets=True&quot;" providerName="System.Data.EntityClient" />

I am using aspnetdb.mdf file, and not any external database. I have searched enough for this, but no use.

Everything works fine with VWD webserver

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