[Kamailio-Users] problem with relaying invite

Hi, I am relaying invites from Kamilio(1.2) to a third proxy, i am receivng Server error occured in SIP messages, I am seeing these messages in log file; Asterisk--------->Kamilio----------------->third-proxy route{ openser.cfg if(method=="INVITE"){ route(4); exit; } route[4] { if(!t_relay("udp:third_proxy_1:5060") || !t_relay("udp:third_proxy_2:5060")) { end_media_session(); sl_reply_error(); } } DEBUG: RFC3261 transaction matching failed DEBUG: t_lookup_request: no transaction found ERROR:tm:t_forward_nonack: no branch for forwarding ERROR:tm:w_t_relay: t_forward_nonack failed DEBUG:sl:sl_reply_error: error text is Server error occurred (1/SL) any idea ? Thanks Asim