client connection problem

Hmmm... I've installed PostgreSQL 7.1.3 with the Red Hat 7.2 installation
package, and everything works fine when connecting from localhost as the
postgres user, but when I try to connect via TCP I get the usual
"connectDBStart() -- ..." error suggesting that postmaster was started
without the "-i" option.

"-i" is added to /etc/init.d/postgresql - a "ps ax | grep postmaster"
confirms this. The pg_hba.conf has modified to allow incoming connections
from the subnet, as shown

...
host all 192.168.1.164 255.255.255.0 trust
host all 192.168.1.150 255.255.255.0 trust
host all 192.168.1.0 255.255.255.0 trust
...

and I've set "tcpip_socket=true" in the postgresql.conf file...

Yet I'm unable to establish a connection - what is wrong?

(nmap confirms that postgresql is listening at port 5432)

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