I'm using SQL Server 2008 R2 Express and try to add ASPNETDB.mdf database to my web site project. However, the following message appears: "Connections to SQL Server database files (.mdf) require SQL Server 2005 Express or SQL Server 2008 Express to be installed and running on the local computer. The current version of SQL Server Express can be downloaded at the following URL: http://go.microsoft.com/fwlink/?LinkId=125883".
In spite of this message, however, database appears in App_Data folder. What is wrong?
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