[Kamailio-Users] Error in header - where and how?

Hi, My carrier doesn't like the invites that come from two specific customers I have, who both use something called VoipSwitch. It returns from the carrier as a Bad Request. Below is the dialog - I'm not sharp enough to see what's wrong - anyone? Thanks! //Anders U 2010/02/01 17:53:42.355689 CustomerIP:5060 -> MyProxyIP:5060 INVITE sip:890912551128650136@MyProxyIP SIP/2.0. CSeq: 1 INVITE. Via: SIP/2.0/UDP CustomerIP:5060;branch=z9hG4bk01025810150801381470578. From: "SERVER BR" <sip:001184517324@CustomerIP:5060>;tag=010258101508381470562. Call-ID: GW6d4c945d2c573c27@CustomerIP. To: <sip:890912551128650136@MyProxyIP>. Contact: <sip:CustomerIP:5060;transport=udp>. Content-Type: application/sdp. Content-Length: 250. Remote-Party-ID: "SERVER BR"<sip:69912390@customerDNS>;privacy=off;screen=no. . v=0. o=VoipSwitch 9298 9298 IN IP4 CustomerIP. s=VoipSIP. i=Audio Session. c=IN IP4 CustomerIP. t=0 0. m=audio 8298 RTP/AVP 18 101. a=rtpmap:18 G729/8000/1. a=fmtp:18 annexb=no. a=rtpmap:101 telephone-event/8000. a=fmtp:101 0-15. a=sendrecv. U 2010/02/01 17:53:42.355990 MyProxyIP:5060 -> CustomerIP:5060 SIP/2.0 100 Giving a try. CSeq: 1 INVITE. Via: SIP/2.0/UDP CustomerIP:5060;branch=z9hG4bk01025810150801381470578;rport=5060;received=187.45.218.17$ From: "SERVER BR" <sip:001184517324@CustomerIP:5060>;tag=010258101508381470562. Call-ID: GW6d4c945d2c573c27@CustomerIP. To: <sip:890912551128650136@MyProxyIP>. Server: Kamailio. Content-Length: 0. . U 2010/02/01 17:53:42.356010 MyProxyIP:5060 -> CarrierIP:5060 INVITE sip:84370551128650136@CarrierIP:5060 SIP/2.0. Max-Forwards: 10. Max-Forwards: 5. Record-Route: <sip:MyProxyIP;lr=on;nat=yes;did=e4c.e1f33ad5>. CSeq: 1 INVITE. Via: SIP/2.0/UDP MyProxyIP;branch=z9hG4bK139a.a74691c5.0. Via: SIP/2.0/UDP CustomerIP:5060;rport=5060;received=CustomerIP;branch=z9hG4bk0102581015080138147057$ From: "SERVER BR" <sip:001184517324@CustomerIP:5060>;tag=010258101508381470562. Call-ID: GW6d4c945d2c573c27@CustomerIP. To: <sip:890912551128650136@MyProxyIP>. Contact: <sip:CustomerIP:5060;transport=udp>. Content-Type: application/sdp. Content-Length: 250. Remote-Party-ID: "SERVER BR"<sip:69912390@customerDNS>;privacy=off;screen=no. . v=0. o=VoipSwitch 9298 9298 IN IP4 CustomerIP. s=VoipSIP. i=Audio Session. c=IN IP4 CustomerIP. t=0 0. m=audio 8298 RTP/AVP 18 101. a=rtpmap:18 G729/8000/1. a=fmtp:18 annexb=no. a=rtpmap:101 telephone-event/8000. a=fmtp:101 0-15. a=sendrecv. U 2010/02/01 17:53:42.608917 CarrierIP:5060 -> MyProxyIP:5060 SIP/2.0 400 Bad Request. Via: SIP/2.0/UDP MyProxyIP;branch=z9hG4bK139a.a74691c5.0. Via: SIP/2.0/UDP CustomerIP:5060;rport=5060;received=CustomerIP;branch=z9hG4bk0102581015080138147057$ From: "SERVER BR" <sip:001184517324@CustomerIP:5060>;tag=010258101508381470562. To: <sip:890912551128650136@MyProxyIP>. Call-ID: GW6d4c945d2c573c27@CustomerIP. CSeq: 1 INVITE. Content-Length: 0.