I get a bind error for the RTP, can someone be kind and explain why?

2008-12-16 10:47:07 [DEBUG] sofia_glue.c:2388 sofia_glue_negotiate_sdp() Audio Codec Compare [PCMA:8:8000]/[PCMA:8:8000]
2008-12-16 10:47:07 [DEBUG] sofia_glue.c:1596 sofia_glue_tech_set_codec() Set Codec sofia/internal/0236661201@sip-corporate2.tele2.se PCMA/8000 20 ms 160 samples
2008-12-16 10:47:07 [DEBUG] sofia_glue.c:2352 sofia_glue_negotiate_sdp() Set 2833 dtmf payload to 101
2008-12-16 10:47:07 [DEBUG] sofia_glue.c:1814 sofia_glue_activate_rtp() AUDIO RTP [sofia/internal/0236661201@sip-corporate2.tele2.se] 192.168.1.112 port 17102 -> 130.244.5X.XX port 27354 codec: 8 ms: 20
2008-12-16 10:47:07 [DEBUG] switch_rtp.c:858 switch_rtp_create() Starting timer [soft] 160 bytes per 20000ms
2008-12-16 10:47:07 [NOTICE] sofia_glue.c:2097 sofia_glue_tech_media() Ring-Ready sofia/internal/0236661201@sip-corporate2.tele2.se!
2008-12-16 10:47:07 [NOTICE] sofia_glue.c:2097 sofia_glue_tech_media() Pre-Answer sofia/internal/0236661201@sip-corporate2.tele2.se!
2008-12-16 10:47:07 [DEBUG] switch_channel.c:1615 switch_channel_perform_pre_answer() sofia/external/0707992871@212.151.14X.XXX receive message [SWITCH_MESSAGE_INDICATE_PROGRESS]
2008-12-16 10:47:07 [INFO] mod_sofia.c:1253 sofia_receive_message() Asked to send early media by sofia/external/0707992871@212.151.14X.XXX
2008-12-16 10:47:07 [DEBUG] switch_channel.c:1585 switch_channel_perform_mark_pre_answered() Send signal sofia/external/0707992871@212.151.14X.XXX [BREAK]
2008-12-16 10:47:07 [DEBUG] sofia_glue.c:497 sofia_glue_ext_address_lookup() STUN Success [85.89.7X.XXX]:[33594]
2008-12-16 10:47:07 [DEBUG] sofia_glue.c:1814 sofia_glue_activate_rtp() AUDIO RTP [sofia/external/0707992871@212.151.14X.XXX] 192.168.1.112 port 17108 -> 130.244.1X.XXX port 17148 codec: 8 ms: 20
2008-12-16 10:47:07 [DEBUG] switch_rtp.c:858 switch_rtp_create() Starting timer [soft] 160 bytes per 20000ms

2008-12-16 10:47:07 [ERR] sofia_glue.c:2045 sofia_glue_activate_rtp() AUDIO RTP REPORTS ERROR: [Bind Error!]

2008-12-16 10:47:07 [NOTICE] sofia_glue.c:2046 sofia_glue_activate_rtp() Hangup sofia/external/0707992871@212.151.14X.XXX [CS_EXECUTE] [DESTINATION_OUT_OF_ORDER]
2008-12-16 10:47:07 [DEBUG] switch_channel.c:1478 switch_channel_perform_hangup() Send signal sofia/external/0707992871@212.151.14X.XXX [KILL]
2008-12-16 10:47:07 [DEBUG] switch_core_session.c:806 switch_core_session_signal_state_change() Send signal sofia/external/0707992871@212.151.14X.XXX [BREAK]
2008-12-16 10:47:07 [INFO] mod_sofia.c:1294 sofia_receive_message() Ring SDP:
v=0
o=FreeSWITCH 1229387233 1229387234 IN IP4 85.89.7X.XXX
s=FreeSWITCH
c=IN IP4 85.89.7X.XXX
t=0 0
m=audio 33594 RTP/AVP 8 101
a=rtpmap:8 PCMA/8000
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-16
a=silenceSupp:off - - - -
a=ptime:20
a=sendrecv

2008-12-16 10:47:07 [NOTICE] mod_sofia.c:1297 sofia_receive_message() Ring-Ready sofia/external/0707992871@212.151.14X.XXX!
2008-12-16 10:47:07 [NOTICE] mod_sofia.c:1297 sofia_receive_message() Pre-Answer sofia/external/0707992871@212.151.14X.XXX!
2008-12-16 10:47:07 [DEBUG] switch_core_session.c:510 switch_core_session_perform_receive_message() Send signal sofia/external/0707992871@212.151.14X.XXX [BREAK]
2008-12-16 10:47:07 [DEBUG] switch_ivr_originate.c:1625 switch_ivr_originate() Originate Resulted in Error Cause: 487 [ORIGINATOR_CANCEL]
2008-12-16 10:47:07 [NOTICE] switch_ivr_originate.c:1666 switch_ivr_originate() Hangup sofia/internal/0236661201@sip-corporate2.tele2.se [CS_CONSUME_MEDIA] [ORIGINATOR_CANCEL]
2008-12-16 10:47:07 [DEBUG] switch_channel.c:1478 switch_channel_perform_hangup() Send signal sofia/internal/0236661201@sip-corporate2.tele2.se [KILL]
2008-12-16 10:47:07 [DEBUG] switch_core_session.c:806 switch_core_session_signal_state_change() Send signal sofia/internal/0236661201@sip-corporate2.tele2.se [BREAK]
2008-12-16 10:47:07 [INFO] mod_dptools.c:1869 audio_bridge_function() Originate Failed.  Cause: ORIGINATOR_CANCEL