Hi All, i m add presence module in openser 1.3. but it not working properly. openser given this error --> DBG:tm:run_reqin_callbacks: trans=0xb60fa590, callback type 1, id 0 entered May 8 21:09:14 [20993] DBG:core:parse_headers: flags=ffffffffffffffff May 8 21:09:14 [20993] DBG:presence:search_event: start event= [message-summary] May 8 21:09:14 [20993] ERROR:presence:handle_subscribe: Missing or unsupported event header field value May 8 21:09:14 [20993] ERROR:presence:handle_subscribe: event= message-summary May 8 21:09:14 [20993] DBG:core:parse_headers: flags=ffffffffffffffff May 8 21:09:14 [20993] DBG:core:check_via_address: params 172.22.24.192, 172.22.24.192, 0 May 8 21:09:14 [20993] DBG:tm:cleanup_uac_timers: RETR/FR timers reset Thanks & Regards Amit