A connection could be established to the application database server but mixed mode authentication isn’t enabled

A connection could be established to the application database server but Mixed mode authentication isn’t enabled.

  Back Ground: When I am trying to configure the Access services in SharePoint 2013 got the error.

 Cause: 

1.     For Configuration of access services in SharePoint 2013 it has to be SQL Server 2012,  It won’t work on SQL server 2008 or R2.  

2.     We need to provide the Application database server as SQL server 2012 only.                   

          3.     Note that you must have a SQL Server 2012 server to host these Access app databases. These databases don’t need to be on the same SQL Server as the rest of the SharePoint databases
       
      A very detailed article on How to configure Access services 2013

      http://www.sp2013blog.com/Lists/Posts/Post.aspx?ID=37         

Please Comment if you need Any Help.Your Feed back is always Welcome.I Am Happy to Help !!!!!