When using the SQL Server client connectivity components from SQL Server 7.0
or earlier, you must set up an alias using the Client Network Utility before
you connect to a named instance of SQL Server 2000. For example, on a
SQL Server 7.0 client, to connect to a named instance of SQL Server 2000,
you must add an alias that points to
\\computername\pipe\MSSQL$instancename\sql\query. If you use an alias name
of computername\instancename, clients can connect by specifying this name
in the same way as SQL Server 2000 clients do. For the TCP/IP Sockets and
NWLink IPX/SPX Net-Libraries, you must use the Client Network Utility to
define an alias on the client that specifies the port address on which the
named instance is listening.