asterisk users - Mar 2016 - Can't create confbridge

Hi all,

I'm trying to get mod_confbridge working from an AGI script.  When I dial
the appropriate extension, I get:

[Mar 24 17:10:08] ERROR[14310][C-00000019]: app_confbridge.c:1201
join_conference_bridge: Conference '1505xxxxxxx' mixing bridge could not
be created.

The AGI script looks, essentially, like:

$main::agi->exec("ConfBridge","1505xxxxxxx");


I've got a dummy /etc/asterisk/confbridge.conf file:

[general]

[default_bridge]
type=bridge

[default_user]
type=user

[default_bridge]
type=bridge

[1505xxxxxxx]
type=bridge


Any suggestions would be welcome.

-- 
Mike Diehl
Diehlnet Communications, LLC.
Voice: (505) 903-5700
Fax: (505) 903-5701