Connections to SQL Server database files (.mdf) require SQL Server 2005 Express or SQL Server 2008 Express to be installed ...

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