Problem logging on to SQL Server Manager Studio Express 2005 using Windows Authentication Mode

How do I logon to SQL Server Manager Studio Express 2005 using Windows Authentication Mode? When I try to logon I get the following error message

"A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible. Verify that the instance name is corr开发者_如何学编程ect and that SQL Server is configured to allow remote connections. (provider: SQL Network Interfaces, error: 26 - Error Locating Server/Instance Specified) (.Net SqlClient Data Provider)"

Thank You,

NH

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Check the server name. If it is your local server, try connecting to server name . or (local), or .\SQLEXPRESS if the server instance is names SQLEXPRESS. If it is a remote server, you may have to enable some network protocols and/or enable remote connections on that server.