Package Manager Console Enable-Migrations CommandNotFoundException only in a specific VS project

I tried to run the command 'Enable-Migrations' in a new project and I got the message: ``` PM> Enable-Migrations The term 'Enable-Migrations' is not recognized as the name of a cmdlet, function, script file, or operable program. Check the spelling of the name, or if a path was included, verif y that the path is correct and try again. At line:1 char:18 + Enable-Migrations <<<< + CategoryInfo : ObjectNotFound: (Enable-Migrations:String) [], CommandNotFoundException + FullyQualifiedErrorId : CommandNotFoundException ``` But in all other projects the command runs just fine. Why is this happening? BTW, I'm using VS2010 Professional SP1 EDIT: I reinstalled with the commmand: Install-Package EntityFramework -IncludePrerelease and the problem went away.