Hello Everybody I am trying to create Instant Communication Application based on MS RTC 1.2 library. I am also using SER 0.8.14 as a SIP server. Voice communication works perfect, messages works perfect but I have a big problem with sending user's status. When I tray to send SUBSCRIBE message I get BAD REQEST response. T 10.1.1.62:3749 -> 10.1.3.10:5060 [AP] SUBSCRIBE sip:pszymanek@sippbx.bb.wasko.pl SIP/2.0 Via: SIP/2.0/TCP 10.1.1.62:8718 Max-Forwards: 70 From: "yarek" <sip:yarek@sippbx.bb.wasko.pl>;tag=d290de95c2124ceca42a748963dd04e9;epid=885 a5b4691 To: <sip:pszymanek@sippbx.bb.wasko.pl> Call-ID: fb0ac597ee2b480f9315e88a9e6bcb06(a)10.1.1.62 CSeq: 2 SUBSCRIBE..Contact: <sip:yarek@sippbx.bb.wasko.pl:8718;maddr=10.1.1.62;transport=tcp> User-Agent: RTC/1.2..Expires: 0 Event: presence..Content-Length: 0 # T 10.1.3.10:5060 -> 10.1.1.62:3749 [AP] SIP/2.0 400 Bad Request Via: SIP/2.0/TCP 10.1.1.62:8718 From: "yarek" <sip:yarek@sippbx.bb.wasko.pl>;tag=d290de95c2124 ceca42a748963dd04e9;epid=885a5b4691 To: <sip:pszymanek@sippbx.bb.wasko.pl>;tag=a6a1c5f60faecf035a1ae5b6e96e979a-3fbe Call-ID: fb0ac597ee2b480f9315e88a9e6bcb06(a)10.1.1.62 CSeq: 2 SUBSCRIBE..Error while parsing headersServer: Sip EXpress router (0.8.14 (i386/linux)) Content-Length: 0 Warning: 392 10.1.3.10:5060 "Noisy feedback tells: pid=13753 req_src_ip= 10.1.1.62 req_src_port=3749 in_uri=sip:pszymanek@sippbx.bb.wasko.pl out_uri=sip:pszymanek@sippbx.bb.wasko.pl via_cnt==1" I configured the presence module, added the lines to ser.cfg if (method=="SUBSCRIBE") { log(1, "Subscribe\n"); if (t_newtran()) { log(1, "Registrar\n"); handle_subscription("registrar"); }; break; }; But it still doesn't work. Has anyone faced a similar problem ? Why it doesn't work ? Is the PA module compatible with MS RTC. Why this masseges are in bad format. Any ideas are very welcome. Best regards Jarosław Gawron email: J.Gawron(a)wasko.pl