I think this may have been answered earlier due to mailing list oddities,
but
just in case:
Change this:
#tcpip_socket = false
to this:
tcpip_socket = true
You may also need to make some changes in pg_hba.conf to authorize the
connection from a particular host. Although this page is aimed at JDBC folk,
you'll find a description of setting up the database for tcp/ip connections
in it that applies to most situations:
http://www.fankhausers.com/postgresql/jdbc/#tcpip
-Nick