[Kamailio-Users] please help

Hi i am configuring RADIUS accounting with openser and i facing the problem with radius_extra module in acc all other parameters are ok but when i add $hdr something i got the following error. parameters with avp are fine but problem is with $hdr. modparam("acc", "radius_extra", ......; X-RTP-Stat=$hdr (X-RTP-Stat; ......) Nov 24 13:30:50 kamailio /sbin/openser[3760]: xl_fill_extra_spec: extra item [hdr] not found Nov 24 13:30:50 kamailio /sbin/openser[3760]: xl_lookup_spec_name: not found PV [hdr] Nov 24 13:30:50 kamailio /sbin/openser[3760]: ERROR:xl_parse_spec: error searching pvar "hdr" Regards, MM Alam SERG Pakistan http://serg.imsciences.edu.pk http://www.imsciences.edu.pk/profiles/masoom_alam.html