[Kamailio-Users] NAT support - can't send command to a RTP proxy

Hello Im trying to enable NAT support with nathelper and RTPproxy, but when I run Kamailio this sows up: [6756] ERROR:nathelper:send_rtpp_command: can't send command to a RTP proxy [6756] ERROR:nathelper:send_rtpp_command: proxy <udp:127.0.0.1:7722> does not respond, disable it [6756] WARNING:nathelper:rtpp_test: can't get version of the RTP proxy [6756] WARNING:nathelper:rtpp_test: support for RTP proxy <udp:127.0.0.1:7722> has been disabled temporarily Im runnig RTPproxy this way (in the same server as Kamailio): rtpproxy -l 192.168.1.25 -s udp:localhost 7722 And this is a part of my kamailio.conf : (....) loadmodule "nathelper.so" (....) # -- nathelper modparam("nathelper", "rtpproxy_sock", "udp:127.0.0.1:7722") modparam("nathelper", "natping_interval", 30) modparam("nathelper", "ping_nated_only", 1) modparam("nathelper", "sipping_bflag", 7) modparam("registrar|nathelper", "received_avp", "$avp(i:80)") modparam("usrloc", "nat_bflag", 6) (....) So, RTPproxy is running and everything seems OK with Kamailio configuration... why can't Kamailio send commands to RTPproxy? Thanks Regards Joao Pereira