[Users] ovpops for serial forking and its cures

Hi all, I'm playing around serial forking with avpops module. My goal is to have one PSTN number mapped to N voip number; so, when the first voip number is busy, OPENSER catch 486 reply and then try with the second AOR and so on. But here raise the problem: the OPENSER forward the reply upstream with a code 407 Proxy Auth Required and the PSTN GW send his ACK and all stop here. Below ther's a snippet of mi openser.cfg: modparam("avpops", "avp_aliases", "serial_fork=i:665") [..skipping..] #if RURI is to a voip user: avp_db_load("$ruri", "$serial_fork"); avp_print(); avp_pushto("$ruri","$serial_fork"); lookup("aliases"); if lookup("location") { t_on_reply("1"); t_on_failure("2"); t_relay(); break; }; onreply_route[1] { if (t_check_status("486")) { t_on_failure("2"); break; }; } failure_route[2] { if (t_check_status("486")) { # delete the first element of the list (if any) and pass to second from list avp_delete("$serial_fork"); if (avp_pushto("$ruri", "$serial_fork")) { append_branch(); avp_delete("$serial_fork"); t_on_failure("2"); t_relay(); } } } My DB entries are: +------+------------+------------------------+-----------+------+---------------------------------------+---------------------+ | uuid | username | domain | attribute | type | value | modified | +------+------------+------------------------+-----------+------+---------------------------------------+---------------------+ | | 0662293703 | sipexp.mydomain.org | 665 | 2 | sip:0662293701@sipexp.mydomain.org | 2005-08-02 15:03:27 | | | 0662293703 | sipexp.mydomain.org | 665 | 2 | sip:0662293702@sipexp.mydomain.org | 2005-08-02 15:03:33 | +------+------------+------------------------+-----------+------+---------------------------------------+---------------------+ Do you have a suggestion to resolve this problem? Why OpenSer send upstream 407 after received 486 Busy Here and not try to send a new INVITE to voip user with new R-URI? Many thanx, Verbal