[Asterisk-Users] Iax unable to transfer

[reseaux]

Dear List
	I have notice this kind of problem between my two * box.
My scenario is :
				    Iax GSM
IaxClient----->PBX1------------>PBX2-->TDM
			today CVS		Stable V1

I use as Client FireFly with IAX2/GSM and try to call my PBX1 this server call 
PBX2 to terminate the call trought a TDM line (TE410P) but after PBX2 join 
the two call i can see the log below from my PBX1, i can speak for few second 
and after the FireFly hangup. 
I have try to change * version from Stable to today CVS but no success same 
problem.
I have enabled the IAX Debug and seems the RX side (PBX1) dont accept 
something from PBX2 and show the "unable to transfer" (im not expert) :-)

The strange thing is if i call from Sip Phone/client i dont have a problem the 
Call is bridged!

The events from the CLI:
---------
Executing Dial("IAX2[pippo2 at pippo2]/5", 
"IAX2/out:###@213.215.xxx.xxx/0012234456666 at outgoing|60|g") in new stack
    -- Called out:######@213.215.xx.xx/0012234456666 at outgoing
    -- Call accepted by 213.215.xx.xx (format GSM)
    -- Format for call is GSM
    -- IAX2[out]/6 stopped sounds
    -- IAX2[out]/6 is ringing
    -- IAX2[out]/6 stopped sounds
    -- IAX2[out]/6 answered IAX2[pippo2 at pippo2]/5
    -- Attempting native bridge of IAX2[pippo2 at pippo2]/5 and IAX2[out]/6
    -- Channel 'IAX2[out]/6' unable to transfer
    -- Hungup 'IAX2[out]/6'
    -- Executing Hangup("IAX2[pippo2 at pippo2]/5", "") in new stack
  == Spawn extension (incoming,0012234456666, 4) exited non-zero on 'IAX2
[pippo2 at pippo2]/5'
    -- Executing Hangup("IAX2[pippo2 at pippo2]/5", "") in new stack
-----------

Thanks in advance for possible help!
Dimitri