I have a cron.hourly script set up to save my iptables chains.  When I reboot, the chain is empty & /etc/sysconfig/iptables contains the default settings.

Here is /etc/cron.hourly/iptables.cron:

#!/bin/sh
/etc/init.d/iptables save >/dev/null 2>&1

What causes this to revert to default settings?

-Devon