[Asterisk-Users] meetme and dtmf

[Accursio Avona]

Hi all,
 I'm experiencing a problem with meetme i can't resolve.
This is my scenario:

A iax client, say IaxComm, make a call through a zap channel. When it 
answers it is tranfered to a conference room.
Then the iax client make a second call though a second zap channel, at 
the other side there is an IVR. Iax client send some dtmf to the IVR 
then it transfers the IVR to the previos conference room.
At this point iax client  joins to the conference and talking to the 
first zap channel need to send dtmf to the IVR.

Here is my problem, at this point the IVR doesn't hear the dtmf sended 
by the iax client, even if it can hear the dtmf sended by the first zap 
channel.

Is there someone that can help me?

any suggestion i welcome.

Best Regards
Accursio Avona