[SR-Users] SMS module not found parameter.

hi all, i am a new bie in kamailio. i use SMS module to send message to GSM net work. my kamailio.cfg is : modparam("sms", "modems", "wavecom[d=/dev/ttyS;c=+84900000022;b=57600; m=new;l=20]") modparam("sms", "networks", "D1[m=10]; d2[m=10]") modparam("sms", "links", "wavecom[D1;d2]") modparam("sms", "default_net", "localhost") modparam("sms", "domain_str", "D1.d2") modparam("sms", "max_sms_parts", 10) modparam("sms", "use_contact", 1) modparam("sms", "sms_report_type", 1) if(method == "MESSAGE"){ if(has_body("text/plain")){ sms_send_msg_to_net("D1"); } } but when i start kamailio the log show : Oct 25 06:28:26 localhost kamailio: ERROR: <core> [modparam.c:143]: set_mod_param_regex: parameter <domain_str> not found in module <sms> Oct 25 06:28:26 localhost kamailio: : <core> [cfg.y:3333]: parse error in config file /usr/local/etc/kamailio/kamailio.cfg, line 173, column 42: Can't set module parameter please help to configure it correct. i use wavecom modem and some infomation: baudrate=57600 c=+84900000022 ip server:192.168.1.100 modem connect with server via com1 (/dev/ttyS0) and kamailio version 3.0.2 thanks for help me. Peter Green