iptables CLASSIFY problem on fedora core 2

The folowing line works perfect on FC 3 and FC 4 :

Code:

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/sbin/iptables -t mangle -A FORWARD -d 192.168.3.68 -j CLASSIFY --set-class 1:20

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but when i try that line on a FC 2 machine i get the error:

Code:

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iptables: Invalid argument

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The CLASSIFY module exists also on my FC2 but doesn't work. (I tested that line on 2 machines). Any ideea?

See the IP configuration of FC2 .Is it OK??

the IP configuration is ok. that machine is running and provides internet for 20 computers (SNAT). Everything works fine. I just want to do a traffic shaping and i can't classify the packets.