http://sqlserver.ro/blogs/cristians_blog/archive/2007/10/30/juggling-with-sql-server-2008-ctps.aspxYou have install a SQL Server 2008 CTP and then another application or you've installed SQL Server 2008 without reading the readme file. You try to use SQL Server Management Studio to connect to your server and you get this error: A connection was successfullyenCommunityServer 2.1 SP2 (Build: 61129.1)