After adding my iptables script

Whats up,

After i made 2 entrys in my firewall script and then restarting i get the following error.
(Redhat 7.2
Iptables 1.2.6a
Kernel 2.4.18)
ADSL Connection
And here is what my script looks lke 2 LINES
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# !/bin/bash
echo 1 > /proc/sys/net/ipv4/ip_forward
iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE
--------------------------------------------------------------------------
And here is what my error looks like:
FLushing all current rules ... OK
Clearing all current rules ..... Ok

iptables: libiptc/libip4tc.C:384 do_check Assertion 'h--->info.valid_hooks == (1 <<0 | 1 << 3)' Failed
/etc/rc3.d/s08 iptables:line -248 280 ABORTED iptables -t $i -F

iptables: libiptc/libip4tc.C:384 do_check Assertion 'h--->info.valid_hooks == (1 <<0 | 1 << 3)' Failed
/etc/rc3.d/s08 iptables:line -245 284 ABORTED iptables -t $i -X


iptables: libiptc/libip4tc.C:384 do_check Assertion 'h--->info.valid_hooks == (1 <<0 | 1 << 3)' Failed
/etc/rc3.d/s08 iptables:line -241 288 ABORTED iptables -t $i -Z

APPLYING firewalls Rules.....OK
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Im not sure what all this means and how can i fix it...ANYHELP