cntl_test fail

[Geffrey Velasquez]

Hi pals, I'm trying to understand the code of libnetfilter_conntrack 
(starting with the example from utils) but the cntl_test fail with this 
errors:

Test for libnetfilter_conntrack

NFNETLINK answers: Invalid argument
TEST 1: create conntrack (-22)
TEST 2: dump conntrack table and reset (-22)
TEST 3: dump conntrack table (-22)
TEST 4: get conntrack (-22)
TEST 5: update conntrack (-22)
NFNETLINK answers: Invalid argument
TEST 6: delete conntrack (-22)
nfnl_open: bind(netlink): Operation not permitted
Can't open handler


I'm running the kernel 2.6.14.3 (from kernel.org) on Centos-4.

Any ideas?

Regards,
Geffrey