[Serusers] How to register MSN Messenger4.6 to non-default port of ser

[Zen Kato]

Hi,

I have been running ser-0.8.10/FreeBSD-4.7 for 6 months
without problem. I changed ser default port,i.e.,5060 to
5065 on ser.cfg because some sip phone needs 5060 for 
their STUN/NAT traversal now. It works fine for sip hardphones
using UDP:5065 of ser for REGISTER, but MSN Messenger4.6
on windows98 could not REGISTER eventhough the REGISTER
packet was sent from the Messenger4.6 to the ser's 5065
as bellow;
-------------------sample -------------------  
U 2003/06/19 10:10:08.426264 192.168.0.21:1079 -> 192.168.0.26:5065
  REGISTER sip:tel.no-ip.com SIP/2.0..Via: SIP/2.0/UDP 192.168.0.21:14236..Fr
  om: <sip:050021 at tel.no-ip.com>;tag=acbb1c1c-a23c-11d7-8627-0090997e7578..To
  : <sip:050021 at tel.no-ip.com>..Call-ID: acbb1c1d-a23c-11d7-8627-0090997e7578
  @192.168.0.21..CSeq: 2 REGISTER..Contact: <sip:192.168.0.21:14236>;methods=
  "INVITE, MESSAGE, INFO, SUBSCRIBE, OPTIONS, BYE, CANCEL, NOTIFY, ACK"..User
  -Agent: Windows RTC/1.0..Expires: 0..Content-Length: 0....                 
--------------------sample end-----------------
Messenger4.6 does not accept "aaa at foo.bar.com:5065" and never
change UDP port: 
       REGISTER sip:foo.bar.com
       From: <sip:aaa at foo.bar.com>
       To: <sip:aaa at foo.bar.com>

I tried "iptel.org SIP Express Router v0.8.10 -- Admin's Guide,
Troubleshooting,Q: Windows Messenger authentication fails. "
but it does not work.

Does someone know how to register Messenger4.6 to non-default
port of sip proxy?

Regards,

Zen Kato