CONNMARK Target Problem

["Sebastian" <netfilter@xxxxxxxxxx>]

Hi List...

I tried to insert a rule using the CONNMARK-Target:
# iptables -t mangle -A OUTPUT -j CONNMARK --set-mark 1
iptables: Invalid argument

Dmesg say's: 
CONNMARK: targinfosize 8 != 12

Kernel is 2.4.25 with pom snapshot 20040319.
Iptables is debian package 1.2.9-6:
# iptables --version
iptables v1.2.9

Any suggestions what i can do to get the CONNMARK target working?

Greets
  Sebastian.