Linux – Cent OS firewall opening port

I've installed postgre on a CentOS server.

I basically followed this guide here: PostgreSQL
On the last step it says I need Open TCP port 5432 and to do so I need to add the following line to my /etc/sysconfig/iptables:

-A RH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp --dport 5432 -j ACCEPT

restarting iptables yields an error on the new line, it seems it doesn't like the RH-Firewall-1-INPUT part. The problem is that, even if i STOP the iptables service the port 5432 seems to remain closed.

Any help will be appreciated.

Edit:

iptables -L -nv
Chain INPUT (policy ACCEPT 0 packets, 0 bytes)
 pkts bytes target     prot opt in     out     source               destination
 2331  187K RH-Firewall-1-INPUT  all  --  *      *       0.0.0.0/0            0.0.0.0/0

Chain FORWARD (policy ACCEPT 0 packets, 0 bytes)
 pkts bytes target     prot opt in     out     source               destination
    0     0 RH-Firewall-1-INPUT  all  --  *      *       0.0.0.0/0            0.0.0.0/0

Chain OUTPUT (policy ACCEPT 2080 packets, 490K bytes)
 pkts bytes target     prot opt in     out     source               destination

Chain RH-Firewall-1-INPUT (2 references)
 pkts bytes target     prot opt in     out     source               destination
    1    29 ACCEPT     all  --  lo     *       0.0.0.0/0            0.0.0.0/0
    0     0 ACCEPT     all  --  eth0.4 *       0.0.0.0/0            0.0.0.0/0
 2330  187K ACCEPT     all  --  eth0   *       0.0.0.0/0            0.0.0.0/0
    0     0 ACCEPT     all  --  eth0.1 *       0.0.0.0/0            0.0.0.0/0
    0     0 ACCEPT     all  --  eth0.2 *       0.0.0.0/0            0.0.0.0/0
    0     0 ACCEPT     all  --  eth0.3 *       0.0.0.0/0            0.0.0.0/0
    0     0 ACCEPT     all  --  eth1   *       0.0.0.0/0            0.0.0.0/0
    0     0 ACCEPT     icmp --  *      *       0.0.0.0/0            0.0.0.0/0           icmp type 255
    0     0 ACCEPT     esp  --  *      *       0.0.0.0/0            0.0.0.0/0
    0     0 ACCEPT     ah   --  *      *       0.0.0.0/0            0.0.0.0/0
    0     0 ACCEPT     udp  --  *      *       0.0.0.0/0            224.0.0.251         udp dpt:5353
    0     0 ACCEPT     udp  --  *      *       0.0.0.0/0            0.0.0.0/0           udp dpt:631
    0     0 ACCEPT     tcp  --  *      *       0.0.0.0/0            0.0.0.0/0           tcp dpt:631
    0     0 ACCEPT     all  --  *      *       0.0.0.0/0            0.0.0.0/0           state RELATED,ESTABLISHED
    0     0 ACCEPT     tcp  --  *      *       0.0.0.0/0            0.0.0.0/0           state NEW tcp dpt:5432
    0     0 ACCEPT     tcp  --  *      *       0.0.0.0/0            0.0.0.0/0           state NEW tcp dpt:22
    0     0 ACCEPT     tcp  --  *      *       0.0.0.0/0            0.0.0.0/0           state NEW tcp dpt:23
    0     0 ACCEPT     tcp  --  *      *       0.0.0.0/0            0.0.0.0/0           state NEW tcp dpt:25
    0     0 ACCEPT     tcp  --  *      *       0.0.0.0/0            0.0.0.0/0           state NEW tcp dpt:80
    0     0 ACCEPT     tcp  --  *      *       0.0.0.0/0            0.0.0.0/0           state NEW tcp dpt:443
    0     0 REJECT     all  --  *      *       0.0.0.0/0            0.0.0.0/0           reject-with icmp-host-prohibited

ps aux | grep postgre
postgres 20132  0.0  0.0 120692  3336 ?        S    15:41   0:00 /usr/bin/postmaster -p 5432 -D /var/lib/pgsql/data
postgres 20134  0.0  0.0 109872   704 ?        S    15:41   0:00 postgres: logger process
postgres 20136  0.0  0.0 120692   980 ?        S    15:41   0:00 postgres: writer process
postgres 20137  0.0  0.0 110872   700 ?        S    15:41   0:00 postgres: stats buffer process
postgres 20138  0.0  0.0 110060   876 ?        S    15:41   0:00 postgres: stats collector process
root     20299  0.0  0.0  61152   728 pts/0    S+   16:08   0:00 grep postgre

EDIT 2: This is what happenes when I turn off iptables.

[maguirre@server ~]# /etc/init.d/iptables stop
Flushing firewall rules:                                   [  OK  ]
Setting chains to policy ACCEPT: filter                    [  OK  ]
Unloading iptables modules:                                [  OK  ]
[maguirre@server ~]# iptables -L -nv
Chain INPUT (policy ACCEPT 0 packets, 0 bytes)
 pkts bytes target     prot opt in     out     source               destination 

Chain FORWARD (policy ACCEPT 0 packets, 0 bytes)
 pkts bytes target     prot opt in     out     source               destination 

Chain OUTPUT (policy ACCEPT 0 packets, 0 bytes)
 pkts bytes target     prot opt in     out     source               destination