I configured presence on an openSER server. It works perfectly with xLite. Buddies see each other and notify and publish messages are sent properly. When PJSIP (XP version) is used, after adding accounts and buddies, subscribe messages are sent properly. Then, changing status on the client goes through 3 stages. 1. Changing status and receiving a notify at the other end works for a very short while (less than a minute). 2. PUBLISH messages are sent to the openSER server, and it sends several NOTIFY messages to the other client before receiving a 200 OK. 3. PUBLISH/OK messages are exchanged between the publishing client and the server and the server no longer sends NOTIFY messages to the subscriber. The move from one stage to another occurs after less than a minute of inactivity. Any thoughts on the matter would be much appreciated. ________________________________________ Samer M. Faour Computer and Communications Engineering American University of Beirut P.O. Box 11-0236/ 1461 Riad el Solh Square 1107 - 2020 Email: smf18 at aub.edu.lb ----------------------------------------------------------------