Music class default requested but no musiconhold loaded

Have this problem:

[ul]Installed MOH from Paul’s Belanger PPA: bugs.launchpad.net/ubuntu/+sour … bug/578283
Created soft links under /var/lib/asterisk/moh pointing to /usr/share/asterisk/moh/files.wav
show reload in Asterisk CLI
Call from SIP peer to
exten => 100,1,Answer
exten => 100,2,MusicOnHold
I get "Music class default requested but no musiconhold loaded"
sudo touch /etc/asterisk/musiconhold.conf
moh reload
Now MOH works just fine[/ul]

Why musiconhold.conf has to have the mtime changed so Asterisk recognizes new or changed MOH files?

Ubuntu Server 9.10
Asterisk 1.6.2