[SR-Users] IMS registration failure

I am trying to get imsdroid register to pcscf . But failing with 504 server timeout . Please help to figure out the reason for register failure . <is_registered_fallback2ip> in module ims_registrar_pcscf [/usr/local/lib64/kamailio/modules/ims_registrar_pcscf.so]  0(310120) DEBUG: <core> [core/modparam.c:123]: set_mod_param_regex(): found <is_registered_fallback2ip> in module ims_registrar_pcscf [/usr/local/lib64/kamailio/modules/ims_registrar_pcscf.so]  0(310120) DEBUG: <core> [core/sr_module.c:632]: find_mod_export_record(): found export of <pcscf_unregister> in module ims_registrar_pcscf [/usr/local/lib64/kamailio/modules/ims_registrar_pcscf.so]  0(310120) DEBUG: <core> [core/cfg.lex:1643]: sr_push_yy_state(): including file: route/register.cfg (/etc/kamailio_pcscf/route/register.cfg)  0(310120) DEBUG: <core> [core/sr_module.c:632]: find_mod_export_record(): found export of <pcscf_is_registered> in module ims_registrar_pcscf [/usr/local/lib64/kamailio/modules/ims_registrar_pcscf.so]  0(310120) DEBUG: <core> [core/cfg/cfg.c:173]: cfg_declare(): new config group has been registered: 'core' (num=56, size=224)  0(310120) DEBUG: <core> [core/cfg/cfg.c:173]: cfg_declare(): new config group has been registered: 'tcp' (num=27, size=108)  0(310120) DEBUG: <core> [core/pt.c:138]: register_procs(): registering new processes: 0 (old) + 1 (new) = 1 (total)  0(310120) DEBUG: <core> [core/cfg/cfg.c:173]: cfg_declare(): new config group has been registered: 'tm' (num=36, size=168)  0(310120) DEBUG: <core> [core/cfg/cfg.c:173]: cfg_declare(): new config group has been registered: 'maxfwd' (num=1, size=4)  0(310120) DEBUG: <core> [core/cfg/cfg.c:173]: cfg_declare(): new config group has been registered: 'siputils' (num=1, size=4)  0(310120) DEBUG: <core> [core/pt.c:138]: register_procs(): registering new processes: 1 (old) + 1 (new) = 2 (total)  0(310120) DEBUG: <core> [core/cfg/cfg.c:173]: cfg_declare(): new config group has been registered: 'xlog' (num=1, size=4)  0(310120) DEBUG: <core> [core/cfg/cfg.c:173]: cfg_declare(): new config group has been registered: 'dispatcher' (num=3, size=24)  0(310120) DEBUG: <core> [core/cfg/cfg.c:173]: cfg_declare(): new config group has been registered: 'sctp' (num=19, size=76)  0(310120) DEBUG: <core> [core/pt.c:138]: register_procs(): registering new processes: 2 (old) + 1 (new) = 3 (total)  0(310120) DEBUG: <core> [core/cfg/cfg.c:173]: cfg_declare(): new config group has been registered: 'dbg' (num=3, size=12)  0(310120) DEBUG: <core> [core/cfg/cfg.c:173]: cfg_declare(): new config group has been registered: 'registrar' (num=11, size=56)  0(310120) DEBUG: <core> [core/cfg/cfg.c:173]: cfg_declare(): new config group has been registered: 'rtpengine' (num=5, size=20)  0(310120) DEBUG: <core> [core/pt.c:138]: register_procs(): registering new processes: 3 (old) + 1 (new) = 4 (total)  0(310120) DEBUG: <core> [core/pt.c:138]: register_procs(): registering new processes: 4 (old) + 1 (new) = 5 (total)  0(310120) DEBUG: <core> [core/pt.c:138]: register_procs(): registering new processes: 5 (old) + 1 (new) = 6 (total)  0(310120) DEBUG: <core> [core/pt.c:99]: init_pt(): registering new processes: 6 (old) + 96 (new) = 102 (total)  0(310120) DEBUG: <core> [core/route.c:885]: fix_actions(): fixing pcscf_is_registered()  0(310120) DEBUG: <core> [core/route.c:885]: fix_actions(): fixing pcscf_unregister()  4(310124) ERROR: *** cfgtrace:request_route=[REGISTER] c=[/etc/kamailio_pcscf/route/register.cfg] l=9 a=16 n=if  4(310124) ERROR: *** cfgtrace:request_route=[REGISTER] c=[/etc/kamailio_pcscf/route/register.cfg] l=7 a=63 n=assign  4(310124) ERROR: *** cfgtrace:request_route=[REGISTER] c=[/etc/kamailio_pcscf/route/register.cfg] l=9 a=25 n=xnotice  4(310124) ERROR: *** cfgtrace:request_route=[REGISTER] c=[/etc/kamailio_pcscf/route/register.cfg] l=10 a=25 n=xnotice  4(310124) ERROR: *** cfgtrace:request_route=[REGISTER] c=[/etc/kamailio_pcscf/route/register.cfg] l=11 a=25 n=xnotice  4(310124) ERROR: *** cfgtrace:request_route=[REGISTER] c=[/etc/kamailio_pcscf/route/register.cfg] l=12 a=25 n=xnotice  4(310124) ERROR: *** cfgtrace:request_route=[REGISTER] c=[/etc/kamailio_pcscf/route/register.cfg] l=15 a=63 n=assign  4(310124) ERROR: *** cfgtrace:request_route=[REGISTER] c=[/etc/kamailio_pcscf/route/register.cfg] l=22 a=16 n=if  4(310124) ERROR: *** cfgtrace:request_route=[REGISTER] c=[/etc/kamailio_pcscf/route/register.cfg] l=17 a=25 n=is_present_hf  4(310124) ERROR: *** cfgtrace:request_route=[REGISTER] c=[/etc/kamailio_pcscf/route/register.cfg] l=18 a=25 n=pcscf_save_pending  4(310124) DEBUG: ims_registrar_pcscf [save.c:378]: save_pending(): registering for UL callback  4(310124) ERROR: *** cfgtrace:request_route=[REGISTER] c=[/etc/kamailio_pcscf/route/register.cfg] l=25 a=63 n=assign  4(310124) ERROR: *** cfgtrace:request_route=[REGISTER] c=[/etc/kamailio_pcscf/route/register.cfg] l=32 a=16 n=if  4(310124) ERROR: *** cfgtrace:request_route=[REGISTER] c=[/etc/kamailio_pcscf/route/register.cfg] l=35 a=16 n=if  4(310124) ERROR: *** cfgtrace:request_route=[REGISTER] c=[/etc/kamailio_pcscf/route/register.cfg] l=33 a=63 n=assign  4(310124) ERROR: *** cfgtrace:request_route=[REGISTER] c=[/etc/kamailio_pcscf/route/register.cfg] l=81 a=25 n=append_hf  4(310124) ERROR: *** cfgtrace:request_route=[REGISTER] c=[/etc/kamailio_pcscf/route/register.cfg] l=83 a=25 n=remove_hf  4(310124) ERROR: *** cfgtrace:request_route=[REGISTER] c=[/etc/kamailio_pcscf/route/register.cfg] l=84 a=25 n=append_hf  4(310124) ERROR: *** cfgtrace:request_route=[REGISTER] c=[/etc/kamailio_pcscf/route/register.cfg] l=85 a=25 n=remove_hf  4(310124) ERROR: *** cfgtrace:request_route=[REGISTER] c=[/etc/kamailio_pcscf/route/register.cfg] l=86 a=25 n=append_hf  4(310124) ERROR: *** cfgtrace:request_route=[REGISTER] c=[/etc/kamailio_pcscf/route/register.cfg] l=94 a=16 n=if  4(310124) ERROR: *** cfgtrace:request_route=[REGISTER] c=[/etc/kamailio_pcscf/route/register.cfg] l=89 a=25 n=is_present_hf  4(310124) ERROR: *** cfgtrace:request_route=[REGISTER] c=[/etc/kamailio_pcscf/route/register.cfg] l=93 a=25 n=append_hf  4(310124) ERROR: *** cfgtrace:request_route=[REGISTER] c=[/etc/kamailio_pcscf/route/register.cfg] l=107 a=25 n=t_on_failure  4(310124) ERROR: *** cfgtrace:request_route=[REGISTER] c=[/etc/kamailio_pcscf/route/register.cfg] l=109 a=25 n=t_on_reply  4(310124) ERROR: *** cfgtrace:request_route=[REGISTER] c=[/etc/kamailio_pcscf/route/register.cfg] l=111 a=5 n=route 85(310272) ERROR: *** cfgtrace:failure_route=[REGISTER_failure] c=[/etc/kamailio_pcscf/route/register.cfg] l=316 a=16 n=if 85(310272) ERROR: *** cfgtrace:failure_route=[REGISTER_failure] c=[/etc/kamailio_pcscf/route/register.cfg] l=311 a=25 n=t_check_status 85(310272) ERROR: *** cfgtrace:failure_route=[REGISTER_failure] c=[/etc/kamailio_pcscf/route/register.cfg] l=312 a=26 n=send_reply 85(310272) ERROR: *** cfgtrace:failure_route=[REGISTER_failure] c=[/etc/kamailio_pcscf/route/register.cfg] l=313 a=26 n=update_stat 85(310272) ERROR: *** cfgtrace:failure_route=[REGISTER_failure] c=[/etc/kamailio_pcscf/route/register.cfg] l=314 a=2 n=exit