Fedora 6+ asterisk 1.45

I have intalled asterisk 1.4.5 on FC 6, the problem is when I tried to Register from Xlite it has reply the Request time out error, sip message like this:

Asterisk just can not handle the Registration message properly, any clue?

U 201.122.100.23:58738 -> 10.1.1.100:5060
REGISTER sip:220.245.46.122 SIP/2.0…Via: SIP/2.0/UDP 192.168.0.68:58738;branch=z9hG4bK-d87543-ba18fa178506c206-1–d8754
3-;rport…Max-Forwards: 70…Contact: sip:john@192.168.0.68:58738;rinstance=85bcc7915cc9bbe8…To: “john”<sip:john@220.2
45.46.122>…From: "john"sip:john@220.245.46.122;tag=9e070c2a…Call-ID: MDI3NzU4NzJiY2RlYjRlMDMzYzQxZmMyM2ZlZTRiNDc…C
Seq: 1 REGISTER…Expires: 3600…Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, NOTIFY, MESSAGE, SUBSCRIBE, INFO…User-
Agent: X-Lite release 1011s stamp 41150…Content-Length: 0…

I 10.1.1.100 -> 203.122.100.23 3:10
…E…:…o…zd…d.r…&89REGISTER sip:220.245.46.122 SIP/2.0…Via: SIP/2.0/UDP 192.168.0.68:58738;branch=z9hG4bK-
d87543-ba18fa178506c206-1–d87543-;rport…Max-Forwards: 70…Contact: <sip:john@192.168.0.68:58738;rinstance=85bcc7915cc9
bbe8>…To: "john"sip:john@220.245.46.122…From: "john"sip:john@220.245.46.122;tag=9e070c2a…Call-ID: MDI3NzU4NzJiY2R
lYjRlMDMzYzQxZmMyM2ZlZTRiNDc…CSeq: 1 REGISTER…Expires: 3600…Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, NOTIFY,
MESSAGE, SUBSCRIBE, INFO…User-Agent: X-Lite release 1011s stamp 41150.

resolved.

Thanks