postgresql connection problems

Hello All,

I am attempting to access postgresql on another machine through PGAdmin III.
I filled out the defaults in the  "New Server Registration" dialog and when
I hit "OK" I get an error stating "Error connecting to the server: FATAL:
missing or erroneous pg_hba.conf file HINT: See server log for details."

The log file states that I have an invalid entry...
The pg_hba.conf looks like the following:

#IPV4 local connections:
host     all          all          127.0.0.1/32          md5
devfrances     all          all          192.168.1.23/32          password

Note: I've also tried changing the devfrances to "... 192.168.1.23
255.255.255.0..." and "...md5" and "...trust"

I've read all the documentation I can find on this particular setup and as
far as I can tell, I am not doing anything wrong. Any ideas?

Thank you,
Frances Collier