nf_queue question

Hi everyone!
I install libnfnetlink_0.0.16 and libnetfilter_queue-0.0.12 and upgrade my kernel to linux-2.6.17.13. Then I run libnetfilter_queue-0.0.12/utils/nfqnl_test , but encounter with this message:
nfnl_talk: sendmsg(netlink) Connection refused
error during nfq_unbind_pf()

#lsmod
ip_queue
xt_NFQUEUE
iptables_filter
iptables

Please tell me how I can handle this error?

Thank you in advanced,
Bahamin

To run nfqueue applications, it requires root rights. If you are running nfqnl_test as root, can you give the exact line output that produces this error ?

Thanks,
Sebastien.

For line output I mean strace line output.