asterisk users - Dec 2004 - Voicemail Codec challanges.

Just working on Configing up Voicemail and now that I have got it 
working and configed and answering the way it should be I have another 
challange.

on the * CLI> I get this
  -- Recording the message
     -- x=0, open writing: 
/var/spool/asterisk/voicemail/default/6001/INBOX/msg0000 format: wav49, 
0x8133390
     -- x=1, open writing: 
/var/spool/asterisk/voicemail/default/6001/INBOX/msg0000 format: gsm, 
0x8132f48
     -- x=2, open writing: 
/var/spool/asterisk/voicemail/default/6001/INBOX/msg0000 format: wav, 
0x8157988
Dec  6 20:13:36 WARNING[24187]: codec_speex.c:196 speextolin_framein: 
Out of buffer space
Dec  6 20:13:36 WARNING[24187]: codec_speex.c:196 speextolin_framein: 
Out of buffer space
Dec  6 20:13:36 WARNING[24187]: codec_speex.c:196 speextolin_framein: 
Out of buffer space
Dec  6 20:13:36 WARNING[24187]: codec_speex.c:196 speextolin_framein: 
Out of buffer space
Dec  6 20:13:36 WARNING[24187]: codec_speex.c:196 speextolin_framein: 
Out of buffer space
Dec  6 20:13:36 WARNING[24187]: codec_speex.c:196 speextolin_framein: 
Out of buffer space
Dec  6 20:13:36 WARNING[24187]: codec_speex.c:196 speextolin_framein: 
Out of buffer space
Dec  6 20:13:36 WARNING[24187]: codec_speex.c:196 speextolin_framein: 
Out of buffer space
Dec  6 20:13:36 WARNING[24187]: codec_speex.c:196 speextolin_framein: 
Out of buffer space
Dec  6 20:13:36 WARNING[24187]: codec_speex.c:196 speextolin_framein: 
Out of buffer space
Dec  6 20:13:36 WARNING[24187]: codec_speex.c:196 speextolin_framein: 
Out of buffer space
Dec  6 20:13:36 WARNING[24187]: codec_speex.c:196 speextolin_framein: 
Out of buffer space
Dec  6 20:13:36 WARNING[24187]: codec_speex.c:196 speextolin_framein: 
Out of buffer space
Dec  6 20:13:36 WARNING[24187]: codec_speex.c:196 speextolin_framein: 
Out of buffer space
Dec  6 20:13:36 WARNING[24187]: codec_speex.c:196 speextolin_framein: 
Out of buffer space
Dec  6 20:13:36 WARNING[24187]: codec_speex.c:196 speextolin_framein: 
Out of buffer space
Dec  6 20:13:36 WARNING[24187]: codec_speex.c:196 speextolin_framein: 
Out of buffer space
     -- Recording automatically stopped after a silence of 10 seconds
     -- Playing 'auth-thankyou' (language 'en')
     -- Recording was 0 seconds long but needs to be at least 3 - abandoning
     -- Playing 'vm-opts' (language 'en')
   == Spawn extension (default, 8500, 1) exited non-zero on
'SIP/6001-8e4e'


when I go to record a voicemail mesg.

Anyone got any idea as to which way I would turn? It is likely to be a 
Config issue but I am unsure were it is to look for it.

Thanks for advice in advance.

David