[SR-Users] fresh kamailio installation unable to connect through jitsi

hi i just finished installation of kamailio on centos 6 64 bit following the docs on http://www.fredposner.com/voip/1457/kamailio-behind-nat/ the user able to chat through jitsi just fine, but when calling, one user able to connect, while the other showing only "connecting" (audio/video) any idea what did i do wrong? here is the /var/log./messages thank you Feb 26 17:43:34 black96 rtpproxy[4293]: INFO:handle_command: new session 2f6e045de764ae9e9252352d952359ae@0:0:0:0:0:0:0:0, tag 2d9e2107;1 requested, type strong Feb 26 17:43:34 black96 rtpproxy[4293]: INFO:handle_command: new session on a port 25982 created, tag 2d9e2107;1 Feb 26 17:43:34 black96 rtpproxy[4293]: INFO:handle_command: pre-filling caller's address with 192.168.168.1:5000 Feb 26 17:43:34 black96 rtpproxy[4293]: INFO:handle_command: new session 2f6e045de764ae9e9252352d952359ae@0:0:0:0:0:0:0:0, tag 2d9e2107;2 requested, type strong Feb 26 17:43:34 black96 rtpproxy[4293]: INFO:handle_command: new session on a port 25192 created, tag 2d9e2107;2 Feb 26 17:43:34 black96 rtpproxy[4293]: INFO:handle_command: pre-filling caller's address with 192.168.168.1:5002 Feb 26 17:43:39 black96 rtpproxy[4293]: INFO:handle_command: lookup on ports 25982/27044, session timer restarted Feb 26 17:43:39 black96 rtpproxy[4293]: INFO:handle_command: pre-filling callee's address with 192.168.168.1:5000 Feb 26 17:43:39 black96 rtpproxy[4293]: INFO:handle_command: lookup on ports 25192/22432, session timer restarted Feb 26 17:43:39 black96 rtpproxy[4293]: INFO:handle_command: pre-filling callee's address with 192.168.168.1:5002 Feb 26 17:43:39 black96 /usr/local/sbin/kamailio[4456]: NOTICE: acc [acc.c:279]: acc_log_request(): ACC: transaction answered: timestamp=1393465419;method=INVITE;from_tag=2d9e2107;to_tag=7175e4ad;call_id=2f6e045de764ae9e9252352d952359ae@0 :0:0:0:0:0:0:0;code=200;reason=OK;src_user=handy;src_domain=184.105.148.231;src_ip=192.168.168.1;dst_ouser=harri;dst_user=harri;dst_domain=192.168.113.2 Feb 26 17:43:39 black96 rtpproxy[4293]: INFO:handle_command: lookup on ports 25982/27044, session timer restarted Feb 26 17:43:39 black96 rtpproxy[4293]: INFO:handle_command: lookup on ports 25192/22432, session timer restarted Feb 26 17:43:40 black96 rtpproxy[4293]: INFO:handle_command: lookup on ports 25982/27044, session timer restarted Feb 26 17:43:40 black96 rtpproxy[4293]: INFO:handle_command: lookup on ports 25192/22432, session timer restarted Feb 26 17:43:42 black96 rtpproxy[4293]: INFO:handle_command: lookup on ports 25982/27044, session timer restarted Feb 26 17:43:42 black96 rtpproxy[4293]: INFO:handle_command: lookup on ports 25192/22432, session timer restarted Feb 26 17:44:43 black96 rtpproxy[4293]: INFO:process_rtp: session timeout Feb 26 17:44:43 black96 rtpproxy[4293]: INFO:remove_session: RTP stats: 0 in from callee, 0 in from caller, 0 relayed, 0 dropped Feb 26 17:44:43 black96 rtpproxy[4293]: INFO:remove_session: RTCP stats: 0 in from callee, 0 in from caller, 0 relayed, 0 dropped Feb 26 17:44:43 black96 rtpproxy[4293]: INFO:remove_session: session on ports 25982/27044 is cleaned up Feb 26 17:44:43 black96 rtpproxy[4293]: INFO:process_rtp: session timeout Feb 26 17:44:43 black96 rtpproxy[4293]: INFO:remove_session: RTP stats: 0 in from callee, 0 in from caller, 0 relayed, 0 dropped Feb 26 17:44:43 black96 rtpproxy[4293]: INFO:remove_session: RTCP stats: 0 in from callee, 0 in from caller, 0 relayed, 0 dropped Feb 26 17:44:43 black96 rtpproxy[4293]: INFO:remove_session: session on ports 25192/22432 is cleaned up Feb 26 17:45:23 black96 rtpproxy[4293]: INFO:handle_command: delete request failed: session 2f6e045de764ae9e9252352d952359ae@0:0:0:0:0:0:0:0, tags 2d9e2107/7175e4ad not found Feb 26 17:45:53 black96 /usr/local/sbin/kamailio[4460]: NOTICE: acc [acc.c:279]: acc_log_request(): ACC: transaction answered: timestamp=1393465553;method=BYE;from_tag=2d9e2107;to_tag=7175e4ad;call_id=2f6e045de764ae9e9252352d952359ae@0:0:0:0:0:0:0:0;code=408;reason=Request Timeout;src_user=handy;src_domain=184.105.148.231;src_ip=192.168.168.1;dst_ouser=harri;dst_user=;dst_domain=184.105.148.231