[Serusers] ACK relaying?

I'm new to ser. I'm trying to setup ser to handle registrations, local call's and forward all other call's to PSTN gateway. I cant get SER to send ACK's recieved from local client to PSTN gate... What am I doing wrong? Here's my config file: loadmodule "/usr/local/lib/ser/modules/mysql.so" loadmodule "/usr/local/lib/ser/modules/sl.so" loadmodule "/usr/local/lib/ser/modules/tm.so" loadmodule "/usr/local/lib/ser/modules/rr.so" loadmodule "/usr/local/lib/ser/modules/maxfwd.so" loadmodule "/usr/local/lib/ser/modules/usrloc.so" loadmodule "/usr/local/lib/ser/modules/registrar.so" loadmodule "/usr/local/lib/ser/modules/textops.so" loadmodule "/usr/local/lib/ser/modules/auth.so" loadmodule "/usr/local/lib/ser/modules/auth_db.so" # ----------------- setting module-specific parameters --------------- modparam("usrloc", "db_mode", 1) modparam("auth_db", "calculate_ha1", yes) modparam("auth_db", "password_column", "password") modparam("rr", "enable_full_lr", 1) # ------------------------- request routing logic ------------------- # main routing logic route{ if (!mf_process_maxfwd_header("10")) { sl_send_reply("483","Too Many Hops"); break; }; if (msg:len >= max_len ) { sl_send_reply("513", "Message too big"); break; }; if (!method=="REGISTER") record_route(); # subsequent messages withing a dialog should take the # path determined by record-routing if (loose_route()) { # mark routing logic in request append_hf("P-hint: rr-enforced\r\n"); route(1); break; }; if (uri==myself) { if (method=="REGISTER") { if (!www_authorize("quantum.ru", "subscriber")) { www_challenge("quantum.ru", "0"); break; }; save("location"); break; }; if (method=="INVITE") { if(lookup("location")) { append_hf("P-hint: usrloc applied\r\n"); route(1); break; } else { if (uri=~"^sip:10372[0-9][0-9]@.*") { log(1,"**** user not found"); sl_send_reply("404", "Not Found"); break; } else { log (1, "Forwarding to PSTN"); rewritehostport("194.186.xx.xx:5060"); route(1); break; }; }; break; }; }; } route[1] { # send it out now; use stateful forwarding as it works reliably # even for UDP2TCP if (!t_relay()) { sl_reply_error(); }; }