Looks like you are missing the o= s= and t= lines. Most important is the o= line as it establishes the session number and sequence number for the session. Looking at the alarm I would say that is what is being complained about. Sent from my iPad > On May 7, 2014, at 12:20 AM, Ramachandra moorthy <ramcm.irtt at gmail.com> wrote: > > this.