[Serusers] problem with nathelper and rtpproxy

Hi, I have problems setting up nathelper on already long time working SER server. my config is here : http://pastebin.ca/1786 I want to proxy all not local calls using rtpproxy to internet (later ipv4-to-ipv6 too) I have last cvs of rtpproxy and ser 0.8.14 on debian sarge... ser can see rtpproxy and on outgoing calls i see in rtpproxy -f2 output : rtpproxy: new session E2D420E7-BBAE-47B0-80E8-EFB777ABED78(a)10.150.63.27, tag 520152133 requested rtpproxy: new session on a port 35000 created, tag 520152133 rtpproxy: pre-filling caller's address with 10.150.63.27:8000 rtpproxy: session timeout rtpproxy: RTP stats: 0 in from callee, 0 in from caller, 0 relayed, 0 dropped rtpproxy: RTCP stats: 0 in from callee, 0 in from caller, 0 relayed, 0 dropped rtpproxy: session on ports 35000/0 is cleaned up and in ethereal i see only one packet send to iptel.org (I'm trying to call iptel :) ) this packet is INVITE , and in headers i can read contact: user@10.150.63.27:5060 is it ok... i thought that it have to be something like asdadasd@sip-proxy.domain:38XXX what am i doing wrong? have i to start rtpproxy with some parameters ? i tried with -l <localip> but same result Thanks in advice, Alexander