[Users] uri_radius and radius_does_user_exist() not working

Hi, I've been through the OpenSER + RADIUS configuration tutorial many, many times, and it works like a charm, except for the uri_radius module which I can't get to detect user existence with the radius_does_user_exist() function. I'm trying to decide whether to send a 404 or a 480, as such: if (!lookup("location")) { if(radius_does_uri_exist()) { sl_send_reply("480", "User offline"); } else { sl_send_reply("404", "User not found"); }; }; It worked identically with the uri_db module's does_user_exist() function. Now the RADIUS server doesn't seem to understand the Call-Check request. I have a dump here: http://tonih.iki.fi/temp/uri_radius.cap Can anyone guess why OpenSER always gives a 404 even for users that exist, but that are simply offline? The users are currently hand-configured into freeradius's text configuration file users.conf. PS. What have you found to be the best way to authenticate users from a domain? FreeRADIUS using Kerberos 5, LDAP or relaying to a Microsoft RADIUS (IAS) server? -- http://tonih.iki.fi/ ~ http://blogit.helsinki.fi/toni.heinonen/ "The progress of a dynamic civilization depends on the special people who make play out of work. In their all-absorbing passion, they create the variations that, through trial and error, become the sources of progress. They make the discoveries that drive the infinite series." - Virginia Postrel