OK ill make it clear. UserA send a request while UserB is logged off. When UserB logged in, the callback was not called. it seems that the call back only work if the user send a request in time where the other(the one who suppose to receive the request) is online as well. One more thing benny I cant add buddy inside the call back. pjsua_add_buddy always returns an error dont know why.. --- On Wed, 8/20/08, Benny Prijono <bennylp at pjsip.org> wrote: From: Benny Prijono <bennylp@xxxxxxxxx> Subject: Re: Presence Subscription Notification To: "pjsip list" <pjsip at lists.pjsip.org> Date: Wednesday, August 20, 2008, 3:26 AM On Wed, Aug 20, 2008 at 1:32 AM, Joseph Maiquez <josephmaiquez at yahoo.com> wrote: But upon logging in of UserA, he had already send a request right? I don't know, but from your description, you never said that UserB ever adds UserA as buddy, or does UserB send SUBSCRIBE when he logs in. ?-benny _______________________________________________ Visit our blog: http://blog.pjsip.org pjsip mailing list pjsip at lists.pjsip.org http://lists.pjsip.org/mailman/listinfo/pjsip_lists.pjsip.org -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/attachments/20080820/bb99ebe9/attachment.html