asterisk users - May 2011 - Could not place calls through IAX

Hello,
  I have some problems in placing calls through IAX... It does not work :)
in the asterisk console I can't see nothing about dialplan enter or
so, IAX debbugging seems to be unuseful...

this is my configuration:
[612]
type=friend
secret=123456
notransfer=yes
disallow=all
allow=gsm
allow=ulaw
allow=alaw
context=from-internal
host=dynamic
requirecalltoken=no

I enabled IAX debugging, but I can see only this:
Rx-Frame Retry[ No] -- OSeqno: 000 ISeqno: 000 Type: IAX     Subclass: NEW
   Timestamp: 00001ms  SCall: 00004  DCall: 00000 [172.31.199.6:4569]
   VERSION         : 2
   CALLING NUMBER  : 612
   CALLING NAME    : 612
   CALLING PRESNTN : 1
   CALLING TYPEOFN : 0
   CALLING TRANSIT : 0
   FORMAT          : 2
   CAPABILITY      : 1550
   USERNAME        : 612
   CALLED NUMBER   : 330
   DNID            : 330
   ADSICPE         : 0
   CALLTOKEN       : Present
   FW BLOCK DATA   : 16 bytes

Rx-Frame Retry[Yes] -- OSeqno: 000 ISeqno: 000 Type: IAX     Subclass: NEW
   Timestamp: 00001ms  SCall: 00004  DCall: 00000 [172.31.199.6:4569]
   VERSION         : 2
   CALLING NUMBER  : 612
   CALLING NAME    : 612
   CALLING PRESNTN : 1
   CALLING TYPEOFN : 0
   CALLING TRANSIT : 0
   FORMAT          : 2
   CAPABILITY      : 1550
   USERNAME        : 612
   CALLED NUMBER   : 330
   DNID            : 330
   ADSICPE         : 0
   CALLTOKEN       : Present
   FW BLOCK DATA   : 16 bytes

Rx-Frame Retry[Yes] -- OSeqno: 000 ISeqno: 000 Type: IAX     Subclass: NEW
   Timestamp: 00001ms  SCall: 00004  DCall: 00000 [172.31.199.6:4569]
   VERSION         : 2
   CALLING NUMBER  : 612
   CALLING NAME    : 612
   CALLING PRESNTN : 1
   CALLING TYPEOFN : 0
   CALLING TRANSIT : 0
   FORMAT          : 2
   CAPABILITY      : 1550
   USERNAME        : 612
   CALLED NUMBER   : 330
   DNID            : 330
   ADSICPE         : 0
   CALLTOKEN       : Present
   FW BLOCK DATA   : 16 bytes


any hint?
bye,
stefano

-- 
Stefano Sasso
http://stefano.dscnet.org/