Random crash

Hello

I'm creating a procedure that intends to make it easy to configure a speech system with festival, orca and speech dispatcher.
It seems to work well, except that after a while, orca crashes.
i'm attaching debug information
I'm using orca 2.30.2-0ubuntu1, festival 1.96~beta-10ubuntu1 and speech-dispatcher 0.6.8~unofficial~rc2-0ubuntu3 .

Crash info:

Traceback (most recent call last):
  File "/usr/lib/pymodules/python2.6/orca/gnomespeechfactory.py", line 959, in __speak
    return speaker.say(text)
  File "/usr/lib/pymodules/python2.6/orca/gnomespeechfactory.py", line 164, in say
    return self.gnome_speaker.say(text)
COMM_FAILURE

Restarting speech...

Traceback (most recent call last):
  File "/usr/lib/pymodules/python2.6/orca/gnomespeechfactory.py", line 959, in __speak
    return speaker.say(text)
  File "/usr/lib/pymodules/python2.6/orca/gnomespeechfactory.py", line 164, in say
    return self.gnome_speaker.say(text)
COMM_FAILURE

Restarting speech...
Something looks wrong with speech. Aborting.