pg_hba.conf issue

Hi friends,

I am Jayakumar and new to PostgreSQL world. I am using PostgreSQL 8.1.3
in Windows 2000 machine.

My problem is, I am unable to connect to PostgreSQL server from another
machine's psql client.

My system IP is 172.16.84.76, and client machine IP is 172.16.85.243.

I can connect to the PostgreSQL server with " psql -Uroot
-h172.16.84.76"
from same system(172.16.84.76)

If I give the above command from 172.16.85.243, results

D:\\Program Files\PostgreSQL\8.1\bin>psql -Uroot - h172.16.84.76
psql: could not connect to server: Connection refused (0x0000274D/10061)
Is the server running on host "172.16.84.76" and accepting
TCP/IP connections on port 5432?

I don't know how to do this in windows.

here pg_hba.conf entries follows
*************************************
host all all 172.16.84.76/32 md5
host all all 172.16.85.243/32 md5

here postgre.conf entry follows
***********************************
#-----------------------------------------------------------------------
----
# CONNECTIONS AND AUTHENTICATION
#-----------------------------------------------------------------------
----

# - Connection Settings -

listen_addresses = '*' # what IP address(es) to listen on;
# comma-separated list of addresses;
# defaults to 'localhost', '*' = all
port = 5432
max_connections = 100
# note: increasing max_connections costs ~400 bytes of shared memory per
# connection slot, plus lock space (see max_locks_per_transaction). You
# might also need to raise shared_buffers to support more connections.

superuser_reserved_connections = 10

#unix_socket_directory = ''
#unix_socket_group = ''
#unix_socket_permissions = 0777 # octal
#bonjour_name = '' # defaults to the computer name

# - Security & Authentication -

authentication_timeout = 150 # 1-600, in seconds

#ssl = on

#password_encryption = on
#db_user_namespace = off

# Kerberos
#krb_server_keyfile = ''
#krb_srvname = 'postgres'
#krb_server_hostname = '' # empty string matches any keytab entry
#krb_caseins_users = off

# - TCP Keepalives -
# see 'man 7 tcp' for details

#tcp_keepalives_idle = 0 # TCP_KEEPIDLE, in seconds;
# 0 selects the system default
#tcp_keepalives_interval = 0 # TCP_KEEPINTVL, in seconds;
# 0 selects the system default
#tcp_keepalives_count = 0 # TCP_KEEPCNT;
# 0 selects the system default

Please find my problem, give me the solution...

Thanks & Regards
Jayakumar M

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