In kamailio server register is done with 200ok response and now i send invite but kamailio not give replay 200ok What i need to do configure of kamaulio file or not And kamailio.log file show some error like Parse_first_line():parse_first_line: bad message And Parse_msg:message=<INVITE ....to, from,via all filed.......> And Receive _msg(): CORE PARSING OF SIP MESSAGE FAILED