[Serusers] Unresolveable destination

Hello, I have a problem with registering to the SER. I use X-Lite SIP softphone, and when I try to register to the SER, I get following messages; (c)2003 Xten Networks Inc. All rights reserved. Private build: 1085 Established SIP protocol listen on: 192.168.2.101:5060 Discovered Port Restricted Cone NAT Firewall SIP: 192.168.2.101:5060 RTP: 192.168.2.101:8000 NAT: 61.116.104.137 PROXY#0: 192.168.2.253:5060 SEND >> 192.168.2.253:5060 REGISTER sip:vfrnd.jp SIP/2.0 Via: SIP/2.0/UDP 192.168.2.101:5060;rport;branch=z9hG4bK235BF512110411D8A98C0090FE68D625 From: hiro <sip:iizuka@vfrnd.jp> To: hiro <sip:iizuka@vfrnd.jp> Contact: "hiro" <sip:iizuka@192.168.2.101:5060> Call-ID: 235BF50F110411D8A98C0090FE68D625(a)vfrnd.jp CSeq: 61073 REGISTER Expires: 1800 Max-Forwards: 70 User-Agent: X-Lite build 1085 Content-Length: 0 SEND >> 192.168.2.253:5060 REGISTER sip:vfrnd.jp SIP/2.0 Via: SIP/2.0/UDP 192.168.2.101:5060;rport;branch=z9hG4bK235BF512110411D8A98C0090FE68D625 From: hiro <sip:iizuka@vfrnd.jp> To: hiro <sip:iizuka@vfrnd.jp> Contact: "hiro" <sip:iizuka@192.168.2.101:5060> Call-ID: 235BF50F110411D8A98C0090FE68D625(a)vfrnd.jp CSeq: 61073 REGISTER Expires: 1800 Max-Forwards: 70 User-Agent: X-Lite build 1085 Content-Length: 0 RECEIVE << 192.168.2.253:5060 SIP/2.0 478 Unresolveable destination (478/TM) Via: SIP/2.0/UDP 192.168.2.101:5060;rport=5060;branch=z9hG4bK235BF512110411D8A98C0090FE68D625 From: hiro <sip:iizuka@vfrnd.jp> To: hiro <sip:iizuka@vfrnd.jp>;tag=a6a1c5f60faecf035a1ae5b6e96e979a-0e7b Call-ID: 235BF50F110411D8A98C0090FE68D625(a)vfrnd.jp CSeq: 61073 REGISTER Server: Sip EXpress router (0.8.11 (i386/linux)) Content-Length: 0 Warning: 392 192.168.2.253:5060 "Noisy feedback tells: pid=11731 req_src_ip=192.168.2.101 req_src_port=5060 in_uri=sip:vfrnd.jp out_uri=sip:vfrnd.jp via_cnt==1" Thanks in advance. Hiro