[Serusers] Cannot capture call status in failure route

[Zeus Ng]

I have the following logic.

route {
...
  t_on_reply("1");
  t_on_failure("1");
  t_relay();
}

onreply_route[1] {
	xlog("L_NOTICE", "Reply status %rs: Reason %rr\n");
}

failure_route[1] {
	xlog("L_NOTICE", "Reply status %rs: Reason %rr\n");
	if (status=="408") {
		do something 1
	} else if (status=="480") {
		do something 2
	} else if (status=="486") {
		do something 3
	}
}

When a reply with 4xx comes in, it first goes through onreply_route[1] and
get the result printed to syslog. The message is then passed to
failure_route[1]. But it seems that the status code and reason are gone. I
get a <null> for both values in the failure route. How should I change the
script to get that. 

Zeus Ng