asterisk users - Aug 2004 - Asterisk --> Mediatrix 1204 --> returned -1: Operation not permitted (syslog)

Aug 11 16:52:15 192.168.199.5 ==>MxStack: Received SIP packet from:
192.168.199.4:5060^M INVITE sip:2217008@192.168.199.5 SIP/2.0^M Via:
SIP/2.0/UDP 192.168.199.4:5060;branch=z9hG4bK3dc783d8^M From:
"Demonstracao"
<sip:2010@192.168.199.4>;tag=as7e5e00c4^M To:
<sip:2217008@192.168.199.5>^M
Contact: <sip:2010@192.168.199.4>^M Call-ID:
25eed581133f7d5501a9ba8221ae3aa5@192.168.199.4^M CSeq: 102 INVITE^M
User-Agent: Asterisk PBX^M Date: Wed, 11 Aug 2004 19:51:05 GMT^M Allow:
INVITE, ACK, CANCEL, OPTIONS, BYE, REFER^M Content-Type: application/sdp^M
Content-Length: 321^M ^M v=0^M o=root 16929 16929 IN IP4 192.168.199.4^M
s=session^M c=IN IP4 192.168.199.4^M t=0 0^M m=audio 13756 RTP/AVP 97 2 0 8
18 101^M a=rtpmap:97 iLBC/8000^M a=rtpmap:2 G726-32/8000^M a=rtpmap:0
PCMU/8000^M a=rtpmap:8 PCMA/8000^M a=rtpmap:18 G729/8000^M a=rtpmap:101
telephone-event/8000^M a=fmtp:101 0-16^M a=silenceSupp:off - - - -^M


Aug 11 16:52:15 192.168.199.5 ==>MxStack: Sending SIP packet to:
192.168.199.4:5060^M SIP/2.0 100 Trying^M Call-ID:
25eed581133f7d5501a9ba8221ae3aa5@192.168.199.4^M CSeq: 102 INVITE^M From:
Demonstracao <sip:2010@192.168.199.4>;tag=as7e5e00c4^M To:
<sip:2217008@192.168.199.5>;tag=e76a3757-c3cc328f^M Via: SIP/2.0/UDP
192.168.199.4:5060;branch=z9hG4bK3dc783d8^M Content-Length: 0^M ^M

---> I think that the problems is here !!!!

Aug 11 16:52:15 192.168.199.5  (CRtpEngine) : CRtpEngine::CloseConnection -
Failed to find the specified connection - AID1, CID31

Aug 11 16:52:15 192.168.199.5 ==>MxStack: Sending SIP packet to:
192.168.199.4:5060^M SIP/2.0 403 Forbidden^M Call-ID:
25eed581133f7d5501a9ba8221ae3aa5@192.168.199.4^M CSeq: 102 INVITE^M From:
Demonstracao <sip:2010@192.168.199.4>;tag=as7e5e00c4^M To:
<sip:2217008@192.168.199.5>;tag=e76a3757-c3cc328f^M Via: SIP/2.0/UDP 

192.168.199.4:5060;branch=z9hG4bK3dc783d8^M Content-Length: 0^M ^M
Aug 11 16:52:15 192.168.199.5 ==>MxStack: Received SIP packet from: 

192.168.199.4:5060^M ACK sip:2217008@192.168.199.5 SIP/2.0^M Via:
SIP/2.0/UDP 192.168.199.4:5060;branch=z9hG4bK3dc783d8^M From:
"Demonstracao"
<sip:2010@192.168.199.4>;tag=as7e5e00c4^M To:
<sip:2217008@192.168.199.5>;tag=e76a3757-c3cc328f^M Contact:
<sip:2010@192.168.199.4>^M Call-ID:
25eed581133f7d5501a9ba8221ae3aa5@192.168.199.4^M CSeq: 102 ACK^M User-Agent:
Asterisk PBX^M Content-Length: 0^M ^M