asterisk users - Nov 2005 - Asterisk voicemail responses - feature?

I am using what I think is a standard out of the box Asteriskathome 
setup, with voicemail,
and digital  receptionist etc I have recorded the names for each 
extensions and they
show up as XXXivrrecording.wav in /var/lib/asterisk/sounds where XXX is 
the extension number.

the response to a call say from PSTN is
receptionist (user presses # for first name directory)
directory (user presses 866 for Tom)
Allison responds "T-o-m if this is the person you are looing for please 
press 1" (user presses 1)
Allison responds "The person at extension 221 is unavailable, please 
leave your message after the tone"
etc.

I was expecting the 221ivrrecording.wav to kick in at some point but it 
never does. Of course,
I would like to hear the recording rather than the 2-2-1

Am I missing something obvious?

Anthony