[Users] Using forward_tcp help

Hi All, I have the REGISTER part of my ser.cfg below, what do you think is wrong because it doesn't replicate it. Do i have to do any changes on parameters of required modules? if (method=="REGISTER") { if ((src_ip=="10.10.10.20") || (src_ip=="10.10.10.30")) { if (isflagset(8)) {xlog("L_INFO", "Register: Source is either 10.10.10.20 or 10.10.10.30\n");}; save_noreply("location"); } else if (!www_authorize("mydomain.com", "subscriber")) { if (isflagset(8)) {xlog("L_INFO", "Register: asking for authentication\n");}; www_challenge("mydomain.com", "0"); break; }; if (isflagset(8)) {xlog("L_INFO", "Register: Authorized, saving location\n");}; if (!save("location")) { sl_reply_error(); } else { if (isflagset(8)) {xlog("L_INFO", "Register: Authorized, saving location\n");}; if ((!src_ip=="10.10.10.20") || (!src_ip=="10.10.10.30")) { if (isflagset(8)) {xlog("L_INFO", "Register: Replicating to 10.10.10.20\n");}; forward_tcp("10.10.10.20", 5060); forward_tcp("10.10.10.30", 5060); }; }; break; };