asterisk users - Sep 2008 - Incoming URL handling Problem (Asterisk problem ?)

Hello,

I use an Asterisk box with the following configuration:

Operating System : linux Fedora Core 4  (2.6.17-1.2142_FC4smp #1)

Asterisk 1.4.18

I use the following asterisk command to send url to client :
Dial(IAX2/ciwww/227 at
postaxxx,,,"https://xx.xxxx.it/es/crm/dashboard.php?codice_ordine=xxx-xx-xxx")

I've a problem using the "Incoming URL handling" feature with my
IAX2
client softphone.


I've dumped my lan traffic and I've filtered the correct URL:

(this is part of my dump (libcap/ASCII)

------------------------Begin
..............pU..UUUUU.......U.UU.U.U....U...UT.U..T..TUU.U...U.U...UU.UU..UUU.UU.UU.TU.UU.U.UU.UUU....U.UU..U.TUTT.UUU....T.U.U.....U..U.UUUU......UU.UU.U.UU.T.U....U..U

..U...AD.UU....U....U.....U.....U...UUU...U.UU.U....U.UU..U..U.UUUUU...UU.U..UUU..UU.U...UUUU..U.U....UUU..UUU.U..U..U.UUUU.UUU...UUU.UUUUU...U.U.UU.T.UU.UUUUUUUUUUU.U....
...%.....
.....p....UUUUUUUU......UUUUUUUU.....UUUUUUUUUU.........UUUUUUU.......UUUUUU.......UUTTTUUU.......UUUUUUUU...........UUUUUUUUUU.......UUUUUUUU........UUUUUUUUUU.......UUU.

..
...(.......
...s...."https://xx.xxxx.it/es/crm/dashboard.php?codice_ordine=xxx-xx-xxx"..
.....s.......
...u..........
dd
..........>...I*P..
------------------------End


the incoming call works fine, but I can't see the url.


When the client (Zoiper Biz softphone 2.16 on  Windows Vista & Windows
2000) receives the call, it does not open any browser
and it does not generate any warning.

Possible Asterisk Problem ?

Can you help me ?

Best Regards,

Fabio