I unzipped the project for chapter 4 and tried to run it using vs2010. In BlogController class at line
Post[] posts = Post.FindAll(); I get the error msg:

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.

Do I need sqlExpress Installed ? If i can use my current sqlserver install how do i modify the code?

This is the version of Visual studio i have :
Microsoft Visual Studio 2010
Version 10.0.30319.1 RTMRel
Microsoft .NET Framework
Version 4.0.30319 RTMRel

and sql server :
Microsoft SQL Server Management Studio 10.0.4000.0