iptables - module ipt_length

[zeff]

I need to use "iptables -m length....." I loaded module ipt_length.o using insmod. Unfortunatelly the command:
iptables -t mangle -A MYSHAPER-OUT -p tcp -m length --length :64 -j MARK --set-mark 2
reports error like that:
iptables v1.2.7a: Couldn't load match `length':File not found

lsmod reprots, that ipt_length is loaded.

Do You have any idea what's the problem. Many thanks in advance.

[zeff]

I forgot: I have Oleg's latest firmware: 1.9.2.7-7g
I would like to ask anybody here to try to:
1) insmod ipt_length
2) lsmod to see whether module is loaded
3) just perform: iptables -m length
After performing 3) all I can see is:
iptables v1.2.7a: Couldn't load match `length':File not found

This message appears when module is not loaded but according to 2) it is loaded

btw. Is there any chance to have layer7 running with latest Oleg's firmware. How to do it?

Thx!