Host configuration

I am running postgress 7.2 on a solaris system and trying to connect from a
windows 2000 based laptop to a database on the solaris system using an
interactive sql program (from McKoi in fact).

I have altered the pg_hba.conf file by appending a line to said file:

TYPE DATABASE IP_ADDRESS MASK AUTH_TYPE AUTH_ARGUMENT
host all 196.45.23.27 255.255.0.0 trust

This should let all other hosts connect to any database.

The server was started with the -i option to allow TCP/IP connections.
The logging from the server indicated a connection attempt was made but the
error message was along the lines of - "No pg_hba.conf entry for host
196.45.23.27, user fdm, database mmpoint."

A similar problem was found if an attempt was made to connect from another
UNIX system but the connection was successful when a connection was
attempeted on the local machine.

I searched for any other instance of pg_hba.conf on the UNIX box, in case it
was picking up a different one but there was just the single instance.
My connection string from my laptop was 'java -classpath
"famejdbc.jar;pgjdbc2.jar" com.datagenic.fusion.isql org.postgresql.Driver
jdbc:postgresql://mambar.fame.com/mmpoint fdm fdm2'
Does anyone have an idea of what I need to do?