hi again, I'm having another problem. I can already run ser-0.9.0, but there is a problem when a client tries to register. I edit the method REGISTER so that all the requests could be accepted: if (method=="REGISTER") { log(1, "LOG: Someone registred\n"); if (!save("location")) { sl_reply_error(); }; break; }; However, with the method, if (method=="REGISTER" && nat_uac_test("3")) { fix_nated_contact(); log(1, "LOG: Someone registred\n"); force_rport(); setflag(2); }; the login failed and i got the following errors: 4(6453) qm_free: freeing frag. 0x81588c4 alloc'ed from parser/msg_parser.c: parse_headers(278) 4(6453) qm_free(0x810bba0, 0x815f428), called from receive.c: receive_msg(234) 4(6453) qm_free: freeing frag. 0x815f410 alloc'ed from receive.c: receive_msg(92) 6(6462) qm_malloc(0x810bba0, 8) called from nathelper.c: timer(1539) 6(6462) qm_malloc(0x810bba0, 8) returns address 0x815cf98 frag. 0x815cf80 (size=8) on 1 -th hit 6(6462) qm_free(0x810bba0, 0x815cf98), called from nathelper.c: timer(1594) 6(6462) qm_free: freeing frag. 0x815cf80 alloc'ed from nathelper.c: timer(1539) 3(6452) udp_rcv_loop: probing packet received from 213.22.190.48 50195 6(6462) qm_malloc(0x810bba0, 8) called from nathelper.c: timer(1539) 6(6462) qm_malloc(0x810bba0, 8) returns address 0x815cf98 frag. 0x815cf80 (size=8) on 1 -th hit 6(6462) qm_free(0x810bba0, 0x815cf98), called from nathelper.c: timer(1594) 6(6462) qm_free: freeing frag. 0x815cf80 alloc'ed from nathelper.c: timer(1539) 6(6462) qm_malloc(0x810bba0, 8) called from nathelper.c: timer(1539) 6(6462) qm_malloc(0x810bba0, 8) returns address 0x815cf98 frag. 0x815cf80 (size=8) on 1 -th hit 6(6462) qm_free(0x810bba0, 0x815cf98), called from nathelper.c: timer(1594) 6(6462) qm_free: freeing frag. 0x815cf80 alloc'ed from nathelper.c: timer(1539) 5(6461) udp_rcv_loop: probing packet received from 213.22.190.48 50195 Does anyone know what could be the problem? Best regards, Ravic Costa