Can't connect to local SQL Server 2008 Express edition

Hi. I'm on Win7 64 bit and have installed SQL 2008 Express 64 bit. The named instance is "sqlexpress" but when using the SQL Server Management Studio 2005, it won't let me connect. It doesn't see it. When I type in the name and try to connect via windows auth (having added myself as an admin account), it gives this error:
 
=================================== Cannot connect to sqlexpress. =================================== 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 correct and that SQL Server is configured to allow remote connections. (provider: Named Pipes Provider, error: 40 - Could not open a connection to SQL Server) (.Net SqlClient Data Provider) ------------------------------ For help, click: http://go.microsoft.com/fwlink?ProdName=Microsoft+SQL+Server&EvtSrc=MSSQLServer&EvtID ...