Anti-SYN script blocking some packets from my own website

Hello all, I use this script which protects from some DOS attacks:

############################################################################
# SCRIPT SYN-FLOOD
############################################################################
#!/bin/sh
# A simple shell to build a Firewall anti SYN Flood
# Under CentOS, Fedora and RHEL / Redhat Enterprise Linux
# servers.
# ----------------------------------------------------------------------------
# Written by LongVNIT 
# (c) 2009 lifeLinux under GNU GPL v2.0+

IPT="iptables --verbose"
MODPROBE="modprobe"
IF="eth0"
IP="SERVER_ADDRESS"
PORT="22 3306 5121 6121 6800"
CHECK_TIME=60
BAN_TIME=120
HITCOUNT=20
MOD="ip_tables ip_conntrack iptable_filter ipt_state"

# Load Module
for M in $MOD
do
    $MODPROBE $M
done

# Flush IPTables
$IPT -F
$IPT -X
$IPT -P INPUT DROP
$IPT -P OUTPUT ACCEPT
$IPT -P FORWARD ACCEPT

# ACCEPT FROM WEBSITE
$IPT -I INPUT -i eth0 -s WEB_ADDRESS -j ACCEPT
$IPT -I FORWARD -i eth0 -s WEB_ADDRESS -j ACCEPT

# Define SYN_CHECK CHAIN
$IPT -N SYN_CHECK

# BAN IP IN 
$IPT -t mangle -A PREROUTING -p TCP -d $IP -m recent --name SYN --update --seconds $BAN_TIME --hitcount $HITCOUNT -j DROP

# DROP INVALID PACKET
$IPT -A INPUT -p TCP ! --syn -m state --state NEW -j DROP

# ACCPET ALL ESTABLISHED PACKET
$IPT -A INPUT -i $IF -m state --state ESTABLISHED -j ACCEPT

# CHECK SYN
for P in $PORT
do
    $IPT -A INPUT -i $IF -p TCP -d $IP --dport $P -m state --state NEW -j SYN_CHECK
done

# ACCEPT
for P in $PORT
do
    $IPT -A INPUT -i $IF -p TCP -d $IP --dport $P -m state --state NEW -j ACCEPT
done

# ACCEPT EVERYTHING FROM LOCAL
$IPT -A INPUT -i lo -j ACCEPT

# SYN_CHECK CHAIN
$IPT -A SYN_CHECK -m recent --set --name SYN
$IPT -A SYN_CHECK -m recent --name SYN --update --seconds $CHECK_TIME --hitcount $HITCOUNT -j LOG --log-level 5 --log-prefix "SYN_FLOOD"
$IPT -A SYN_CHECK -m recent --name SYN --update --seconds $CHECK_TIME --hitcount $HITCOUNT -j DROP

It works fine, however this detects my website ip as an attacker, for which I added these two rules:

# ACCEPT FROM WEBSITE
$IPT -I INPUT -i eth0 -s WEB_ADDRESS -j ACCEPT
$IPT -I FORWARD -i eth0 -s WEB_ADDRESS -j ACCEPT

Which enable my ip website, but it's blocking some packets.

In my website I've got a status checker which checks the status of the server (if it's up or down) and how many users are connected. This status checker has two versions: one which update status and users online everytime I visit the page and the second one which updates it every 60 seconds, saving the status in a cache file. The second one is which fails sometimes, and it was working fine with other hosts, so it has to be a problem with the script.

Is there any way I could make the script ignore all rules and chains for this IP?