[Serusers] Troubles setting up radius authentication

I am trying to switch from database authentication to radius authentication. I have compiled and installed the module. I have added the following to my ser.cfg modparam("auth_radius", "radius_config", "/etc/ser/radiusclient.conf") modparam("auth_radius", "service_type",15) if (method=="REGISTER") { log(1,"authenticating"); if (!radius_www_authorize("test.net")) { log(1,"radius auth failure"); www_challenge("test.net", "0"); break; }; I have configured the following in /etc/ser/radiusclient.conf authserver radius1.test.net:1812 authserver radius2.test.net:1812 servers /etc/servers dictionary /etc/sip_dictionary I have configured the following in /etc/servers Radius1.test.net secret Radius2.test.net secret2 I get the following in my messages log. Sep 23 10:39:03 voip2 /usr/sbin/ser[25945]: authenticating Sep 23 10:39:03 voip2 /usr/sbin/ser[25945]: radius auth failure Sep 23 10:39:30 voip2 /usr/sbin/ser[25947]: authenticating Sep 23 10:39:30 voip2 /usr/sbin/ser[25947]: radius auth failure Sep 23 10:39:30 voip2 /usr/sbin/ser[25949]: authenticating Sep 23 10:39:30 voip2 /usr/sbin/ser[25949]: radius auth failure Sep 23 10:39:34 voip2 /usr/sbin/ser[25948]: authenticating Sep 23 10:39:34 voip2 /usr/sbin/ser[25948]: radius auth failure Sep 23 10:39:34 voip2 /usr/sbin/ser[25945]: authenticating Sep 23 10:39:34 voip2 /usr/sbin/ser[25945]: radius auth failure And ngrep port 1812 shows no traffic at all. Where are these auth request going? How can I get more debug info? Thanks for your help. Stephen