Hi, I have configured Freeswitch to register to a sipX server. Did a quick modification in sofia_reg.c to send a SUBSCRIBE with event:message-summary as soon as the registration is successful. With this change I see a SUBSCRIBE sent out, then receives a NOTIFY which is responded with '200 OK'(automatically) and then a '202 Accepted' is received for the SUBSCRIBE. But the issue is that the incoming NOTIFY is notified as 'nua_i_error' Here is the exact capture from console on receiving a NOTIFY "2008-02-01 17:44:41 [DEBUG] sofia.c:183 sofia_event_callback() event [nua_i_error] status [500][Responding to a Non-Existing Request] session: n/a" The event expected is 'nua_i_notify', so as to interpret the MWI Can someone give me some pointers to this issue. I am currently using svn Revision: 7401 Appreciate your help Thanks in advance -Sanjeev