Security :: Errors: Jan 24 04:15:03 Servername Kernel: Iptables: Loop Hook 1 Pos 464080 00000022

I have a few mail servers (CentOS 5.5) that are running OSSEC Active Response (2.5.1) on Iptables (1.3.5-5.3.el5_4.1). We are currently having a problem where we get loop hook errors:Jan 24 04:15:03 servername kernel: iptables: loop hook 1 pos 464080 00000022 this is the firewall-drop.sh we are currently using:

Code:
#!/bin/sh
# Adds an IP to the iptables drop list (if linux)
# Adds an IP to the ipfilter drop list (if solaris, freebsd or netbsd)
# Adds an IP to the ipsec drop list (if aix)

[Code]...