I am using SQL Server 2008 R2. It is working fine. But recently, I have changed my hosting server and I came to know that they have installed SQL Server 2
Upgrade your SqlServer management studio from 2008 to 2012
Or Download the service packs of SqlServer Management Studio and update probably resolve you solution
You can download the SQL Server Management studio 2012 from below link
Microsoft® SQL Server® 2012 Express http://www.microsoft.com/en-us/download/details.aspx?id=29062