[Asterisk-Users] play_and_record: No audio available

[Ryan Courtnage]

Hello all,

I have just installed the latest Asterisk csv on Slackware 9.1.

I've configured the system using the example config in OnLamp's 
"Asterisk: A Bare-Bones VoIP Example" tutorial.  
[http://www.onlamp.com/pub/a/onlamp/2003/07/03/asterisk.html?page=1]

Using X-Lite SIP client on Mac OS X

When trying to leave a voicemail on one of the extensions, the Asterisk 
console reports:

Feb  7 23:26:17 WARNING[409618]: app_voicemail.c:1200 play_and_record: 
No audio available on SIP/2001-dc12??

and the resulting .wav file in /var/spool/asterisk is empty/invalid.

I did find a thread (via google) that described someone with the same 
problem, who rectified it by re-installing.  I've reinstalled, but to 
no avail.

Can someone please point me in the right direction to troubleshoot this?
Thanks
Ryan