asterisk users - Jun 2009 - 1.6.1: unable to create channel IAX2 to Junction

Trying to set up Junction Networks for outgoing on 1.6.1:

extensions.conf:

exten => _99X.,n,Dial(IAX2/jnctn_out/${called-num})

iax.conf

[jnctn_out]
type=peer
host=iax.jnctn.net
usernamesecretqualify=yes

I'm not using realtime.

But CLI:

     -- Executing [99xxxyyyy at internal:3] Dial("DAHDI/1-1", 
"IAX2/jnctn_out/1wwwxxxzzzz") in new stack
[2009-06-27 14:21:45] WARNING[2541]: app_dial.c:1528 dial_exec_full: 
Unable to create channel of type 'IAX2' (cause 20 - Unknown)
   == Everyone is busy/congested at this time (1:0/0/1)

Is this my problem or junction's? It sure looks like it's mine. No 
mention of a refused connection, etc.

I tried setting iax debug on, upping core debug and verbose to 20, but 
no additional messages.

sean