asterisk users - Aug 2008 - park calls - cannot hear digits being played

I configured "parkcalls" and can see on "cli" Playing
"digits/7" etc but I cannot hear them in the phone.

I have:

features.conf.
[general]
parkext => 700
parkpos => 701-720	

extensions.conf:
[extensions]
include => parkedcalls

What did I miss?

-- 
#Joseph