The database 'AdventureWorks2008R2' cannot be opened because it is version 661. This server supports version 655 and earlier. A downgrade path is not supported.
Full Details
TITLE: Microsoft SQL Server Management Studio
------------------------------
Attach database failed for Server 'RAGAVANG-LAP\SQLEXPRESS'. (Microsoft.SqlServer.Smo)
For help, click: http://go.microsoft.com/fwlink?ProdName=Microsoft+SQL+Server&ProdVer=10.0.5500.0+((Katmai_PCU_Main).110921-2358+)&EvtSrc=Microsoft.SqlServer.Management.Smo.ExceptionTemplates.FailedOperationExceptionText&EvtID=Attach+database+Server&LinkId=20476
------------------------------
ADDITIONAL INFORMATION:
An exception occurred while executing a Transact-SQL statement or batch. (Microsoft.SqlServer.ConnectionInfo)
------------------------------
The database 'AdventureWorks20 ...
Go to the complete details ...