[Kamailio-Users] i want to stop second registration request if user already registered

Hi All, i want to stop second registration request if use already registered i am using below code but getting no any response. please help me how to solve this problem. if (method=="REGISTER") { if (registered("location") ) { xlog("L_NOTICE","Asif: lookup(location) Passed\n"); sl_send_reply("699", "User Not Found"); return; } route(2); return; route[2] { # ----------------------------------------------------------------- # REGISTER Message Handler # ---------------------------------------------------------------- xlog("L_NOTICE","Danish: Entering route[2]\n"); # if (registered("location")) { # xlog("L_NOTICE","Asif: lookup(location) failed\n"); # sl_send_reply("404", "User Not Found"); # return; # }; xlog("L_NOTICE","Asif: Register message IPsrcaddr [$si], RecvdIPaddr[$Ri]\n"); if (!search("^Contact:[ ]*\*") && nat_uac_test("2")) { xlog("L_NOTICE","Danish: In route[2] Found Nated contact\n"); setflag(6); setbflag(6); # if you want OPTIONS natpings uncomment next setbflag(7); fix_nated_register(); force_rport(); }; sl_send_reply("100", "Trying"); if (!radius_www_authorize("abc.com")) { www_challenge("abc.com", "1"); }; consume_credentials(); if (!save("location")) { sl_reply_error(); }; } } regards, Asif