[Serusers] PSTN -> SER -> SEMS problem

Hello. We have SEMS and SER working together ok for SIP to SIP calls. We also have a Cisco AS5300 which connects via sip to SEMS through SER for PSTN originated calls. When calls are made from SIP phones, the voicemail works perfectly well. Now, when the call originates in in the PSTN and is routed to SEMS, we get several errors (appended afterwards). I have also appended a copy of the invite produced by the AS5300 produced by ngrep. I can see the "from" field is there??? Any ideas of what may be going on?? Thanks in advance. Alex SEMS debug trace ------------------------------------------ (4224) ERROR: run (AmServer.cpp:201): invalid FIFO command: cmd.from_tag is empty !!! (4224) ERROR: consume_request (AmServer.cpp:85): Consumed: 0.2 (4224) ERROR: consume_request (AmServer.cpp:85): Consumed: sip_request.voicemail (4224) ERROR: consume_request (AmServer.cpp:85): Consumed: INVITE (4224) ERROR: consume_request (AmServer.cpp:85): Consumed: 08701757575 (4224) ERROR: consume_request (AmServer.cpp:85): Consumed: . (4224) ERROR: consume_request (AmServer.cpp:85): Consumed: sip.dieseltelecom.co.uk (4224) ERROR: consume_request (AmServer.cpp:85): Consumed: 217.73.64.15 (4224) ERROR: consume_request (AmServer.cpp:85): Consumed: 5090 (4224) ERROR: consume_request (AmServer.cpp:85): Consumed: sip:08701757575@sip.dieseltelecom.co.uk:5090 (4224) ERROR: consume_request (AmServer.cpp:85): Consumed: sip:08701758017@217.73.64.17 (4224) ERROR: consume_request (AmServer.cpp:85): Consumed: "08701758017" <sip:08701758017@217.73.64.17> (4224) ERROR: consume_request (AmServer.cpp:85): Consumed: <sip:08701757575@217.73.64.15> (4224) ERROR: consume_request (AmServer.cpp:85): Consumed: 1f4188ee1cb4018f14b86c1c3d1ec025(a)217.73.64.17 (4224) ERROR: consume_request (AmServer.cpp:85): Consumed: as441af06d (4224) ERROR: consume_request (AmServer.cpp:85): Consumed: . (4224) ERROR: consume_request (AmServer.cpp:85): Consumed: 102 (4224) ERROR: consume_request (AmServer.cpp:85): Consumed: 10256:42537059 (4224) ERROR: consume_request (AmServer.cpp:85): Consumed: <sip:08701757575@217.73.64.15;ftag=as441af06d;lr=on> (4224) ERROR: consume_request (AmServer.cpp:85): Consumed: sip:08701757575@217.73.64.15;ftag=as441af06d;lr=on (4224) ERROR: consume_request (AmServer.cpp:85): Consumed: P-MsgFlags: 0 (4224) ERROR: consume_request (AmServer.cpp:85): Consumed: Date: Thu, 11 Nov 2004 09:27:25 GMT (4224) ERROR: consume_request (AmServer.cpp:85): Consumed: . (4224) ERROR: consume_request (AmServer.cpp:85): Consumed: v=0 (4224) ERROR: consume_request (AmServer.cpp:85): Consumed: o=root 7911 7911 IN IP4 217.73.64.17 (4224) ERROR: consume_request (AmServer.cpp:85): Consumed: s=session (4224) ERROR: consume_request (AmServer.cpp:85): Consumed: c=IN IP4 217.73.64.17 (4224) ERROR: consume_request (AmServer.cpp:85): Consumed: t=0 0 (4224) ERROR: consume_request (AmServer.cpp:85): Consumed: m=audio 15670 RTP/AVP 8 0 3 101 (4224) ERROR: consume_request (AmServer.cpp:85): Consumed: a=rtpmap:8 PCMA/8000 (4224) ERROR: consume_request (AmServer.cpp:85): Consumed: a=rtpmap:0 PCMU/8000 (4224) ERROR: consume_request (AmServer.cpp:85): Consumed: a=rtpmap:3 GSM/8000 (4224) ERROR: consume_request (AmServer.cpp:85): Consumed: a=rtpmap:101 telephone-event/8000 (4224) ERROR: consume_request (AmServer.cpp:85): Consumed: a=fmtp:101 0-16 (4224) ERROR: consume_request (AmServer.cpp:85): Consumed: a=silenceSupp:off - - - - ngrep trace ---------------------------------------------------------------- U 217.73.64.56:49491 -> 217.73.64.15:5060 INVITE sip:08701758907@217.73.64.15;user=phone;phone-context=unknown SIP/2.0.. Via: SIP/2.0/UDP 217.73.64.56:5060.. From: "7830100628" <sip:7830100628@217.73.64.56>.. To: <sip:08701758907@217.73.64.15;user=phone;phone-context=unknown>.. Date: Thu, 11 Nov 2004 10:10:57 GMT.. Call-ID: D07C0062-330011D9-802BBC6D-9F6000E8(a)217.73.64.56.. Cisco-Guid: 3497747514-855642585-2150218861-2673869032.. User-Agent: Cisco VoIP Gateway/ IOS 12.x/ SIP enabled.. CSeq: 101 INVITE.. Max-Forwards: 6.. Timestamp: 1100167857.. Contact: <sip:7830100628@217.73.64.56:5060;user=phone>.. Expires: 180..Content-Type: application/sdp.. Content-Length: 134.... v=0.. o=CiscoSystemsSIP-GW-UserAgent 1157 7884 IN IP4 217.73.64.56.. s=SIP Call.. c=IN IP4 217.73.64.56.. t=0 0.. m=audio 20828 RTP/AVP 8..