Details
Product:SQL Server
ID:2
Source:MSSQLServer
Version:10.0
Component:SQLEngine
Message:An error has occurred while establishing a connection to the server. When connecting to SQL Server, this failure may be caused by the fact that under the default settings SQL Server does not allow remote connections. (provider: Named Pipes Provider, error: 40 - Could not open a connection to SQL Server) (.Net SqlClient Data Provider)
   
Explanation

SQL Server did not respond to the client request because the server is probably not started.

   
User Action

Make sure that the server is started.

   
   
Version:9.0
Component:SQLEngine
Message:An error has occurred while establishing a connection to the server. When connecting to SQL Server 2005, this failure may be caused by the fact that under the default settings SQL Server does not allow remote connections. (provider: Named Pipes Provider, error: 40 - Could not open a connection to SQL Server) (.Net SqlClient Data Provider)
   
Explanation

SQL Server did not respond to the client request because the server is probably not started.

   
User Action

Make sure that the server is started.