[OpenSER-Users] Presence Error

[KUMAR]

Hi all,

My UA, is sending a SUBSCRIBE to the server with Event: presence and
Accept: application/pidf+xml. But the openser upon receiving this
returns a 489 Bad Request. The debug at the server shows:
Missing or unsupported event header field value

Can anyone please tell me the cause of the problem. I've also tried
changing Event: presence.winfo ,  but that too doesn't work.
Thank you.
kumar