Correct. I could not connect to SQL 2014 with the previous version of SSMS.
>To be on the safe side, it's better to install the latest version of SSMS (SQL 2014). I am not 100% sure you will be able to connect to higher version of the Server using lower version of SSMS.
Craig Berntson
MCSD, Microsoft .Net MVP, Grape City Community Influencer