Hi all, Have installed and configured ser and everything works fine until I turn on authentication. I have a suspicion my problem resides in my route logic. This is how I modified the default ser.cfg file: route{ if (!mf_process_maxfwd_header("10")) { sl_send_reply("483","Too Many Hops"); break; }; if (len_gt( max_len )) { sl_send_reply("513", "Message too big"); break; }; rewriteFromRoute(); if (uri=~"mkc.co.za") { if (method=="REGISTER") { if (!www_authorize("mkc.co.za", "subscriber")) { www_challenge("mkc.co.za", "0"); break; }; save("location"); break; }; if (!lookup("location")) { sl_send_reply("404", "Not Found"); break; }; }; if (!t_relay()) { sl_reply_error(); }; } Any ideas? Have gone through all the sql confs and sql seems fine (default installation), only added one user with serctl. Kind regards, Emil