Hi, I'm trying to run freeswitch, and seems 5060 is not listenning, I'm running it on Windows, I'm sure that 5060 is not used by other applications, and 130.62.240.10 is the only ipv4 address on the machine. The external ip is different one. I've tried using 127.0.0.1 to replace the {local_ip_v4} in vars.xml, it remains the same. I've seen previous solution on this, but seems there're only two possibilities, 1) the port 5060 is already used. 2) the ip is not valid. I'm sure they are both not in my env. So, what are else possibilities for such errors? Thanks in advance! 2012-04-19 00:33:16.796875 [DEBUG] sofia.c:3527 ext-rtp-ip [auto-nat] 2012-04-19 00:33:16.796875 [DEBUG] sofia.c:3527 ext-sip-ip [auto-nat] 2012-04-19 00:33:16.796875 [DEBUG] sofia.c:3527 rtp-timeout-sec [300] 2012-04-19 00:33:16.796875 [DEBUG] sofia.c:3527 rtp-hold-timeout-sec [1800] 2012-04-19 00:33:16.796875 [DEBUG] sofia.c:3527 force-register-domain [130.62.240.10] 2012-04-19 00:33:16.796875 [DEBUG] sofia.c:3527 force-subscription-domain [130.62.240.10] 2012-04-19 00:33:16.796875 [DEBUG] sofia.c:3527 force-register-db-domain [130.62.240.10] 2012-04-19 00:33:16.796875 [DEBUG] sofia.c:3527 challenge-realm [auto_from] 2012-04-19 00:33:16.796875 [NOTICE] sofia.c:4372 Started Profile internal [sofia_reg_internal] 2012-04-19 00:33:16.796875 [DEBUG] mod_sofia.c:5193 Waiting for profiles to start 2012-04-19 00:33:16.796875 [DEBUG] sofia.c:1747 Creating agent for internal 2012-04-19 00:33:16.828125 [ERR] sofia.c:1813 Error Creating SIP UA for profile: external 2012-04-19 00:33:16.843750 [ERR] sofia.c:1813 Error Creating SIP UA for profile: internal 2012-04-19 00:33:16.843750 [ERR] sofia.c:1813 Error Creating SIP UA for profile: internal-ipv6