problem with ulog?

[Adrian Gheorghe <adrianghe@shaw.ca>]

I have installed the last version of iptables available for debian: 1.2.6a-5
and also ulogd
and I have tried implementing a rule that logs files using the ULOG chain

here is a sample:
iptables -A INPUT -i eth0 -p tcp --dport 139 -j ULOG --ulog-nlgroup
1 --ulog-prefix ***SAMBA***

although when I execute it I get:
"No chain/target/match by that name"
do I have to initialize the ULOG chain in any way?

ulogd.conf has the default configuration

Is there a problem with iptables or am I doing something wrong (mostlikely)
?

thanx.