[Serusers] when making a call

Hi, For some reason when trying to call one of my nat users, I get the following logs: Apr 26 18:08:59 max /usr/local/sbin/ser[11613]: record_route(): Double attempt to record-route Apr 26 18:08:59 max /kernel: Apr 26 18:08:59 max /usr/local/sbin/ser[11613]: record_route(): Double attempt to record-route Apr 26 18:08:59 max /usr/local/sbin/ser[11613]: ERROR: send_rtpp_command: can't connect to RTP proxy Apr 26 18:08:59 max /kernel: Apr 26 18:08:59 max /usr/local/sbin/ser[11613]: ERROR: send_rtpp_command: can't connect to RTP proxy Apr 26 18:08:59 max /usr/local/sbin/ser[11613]: WARNING: rtpp_test: can't get version of the RTP proxy Apr 26 18:08:59 max /usr/local/sbin/ser[11613]: WARNING: rtpp_test: support for RTP proxy has been disabled temporarily Apr 26 18:08:59 max /usr/local/sbin/ser[11613]: ERROR: force_rtp_proxy2: support for RTP proxy is disabled Apr 26 18:08:59 max /kernel: Apr 26 18:08:59 max /usr/local/sbin/ser[11613]: ERROR: force_rtp_proxy2: support for RTP proxy is disabled Apr 26 18:08:59 max /usr/local/sbin/ser[11613]: WARNING: receive_msg: error while trying script Apr 26 18:09:03 max /usr/local/sbin/ser[11614]: BYE or CANCEL Apr 26 18:09:03 max /usr/local/sbin/ser[11614]: ACC: transaction answered: call_id=DE9BD75A-AF31-47D2-B326-0C71A7FC2E41(a)10.200.3.173, totag=n/a, from=6494485566 <sip:6494485566@voip.fast.co.nz>;tag=2706947050, i-uri=sip:89415@voip.fast.co.nz, method=CANCEL, o-uri=sip:89415@219.88.249.72:5060, fromtag=2706947050, code=200, to=<sip:89415@voip.fast.co.nz>, uid=n/a, userpart=89415 Apr 26 18:09:03 max /usr/local/sbin/ser[11614]: WARNING: receive_msg: error while trying script Any ideas? Thanks Barry