[Users] Q:ABOUT:400 Bad Request RESPONESE

Hi evreybody My sip server sends this message to the Phone. INVITE sip:192.168.1.10:7191 SIP/2.0 Record-Route: <sip:192.168.1.20;lr=on;ftag=1604fbda> Via: SIP/2.0/UDP 192.168.1.20;branch=z9hG4bK2f9.039444a7.0 Via: SIP/2.0/UDP 192.168.1.9:7191;branch=z9hG4bK71Fso4gTlg Max-Forwards: 69 Content-Type: application/sdp To: <sip:2109075@192.168.1.20> From: "4422109087" <sip:4422109087@192.168.1.20>;tag=1604fbda Call-ID: 5f1e5301-40b07670(a)192.168.1.9 CSeq: 1596803196 INVITE Allow: INVITE, ACK, CANCEL, MESSAGE, OPTIONS, BYE, UPDATE, REFER, SUBSCRIBE, NOTIFY, SERVICE User-Agent: URMET-UserAgent Contact: "4422109087" <sip:4422109087@192.168.1.9:7191> P-hint: usrloc applied v=0 o=ntzum 16015906 936435728 IN IP4 192.168.1.9 s=- c=IN IP4 192.168.1.9 b=CT:31 t=0 0 m=audio 49648 RTP/AVP 4 96 97 98 a=sendrecv a=rtpmap:4 G723/8000 a=rtpmap:96 AMR/8000 a=rtpmap:97 X-G723-7200/8000 a=rtpmap:98 telephone-event/8000 a=fmtp:98 0-15 m=video 49650 RTP/AVP 99 100 34 a=sendrecv a=rtpmap:99 H264/90000 a=fmtp:99 packetization-mode=1 a=rtpmap:100 H263-1998/90000 a=rtpmap:34 H263/90000 and i have like response a 400 Bad Request. Any hava an idea why? Thank's in Advanced. Alejandro Sanchez ___________________________________________________________ Do You Yahoo!? La mejor conexión a Internet y <b >2GB</b> extra a tu correo por $100 al mes. http://net.yahoo.com.mx