asterisk users - Oct 2011 - Questions on IAX client

Hi,

I used to use Zoiper IAX to connect to my asterisk server from remote site.
On asterisk CLI, I can see my zoiper client registered and stay on line.
HOwever, I don't know why now I can't call this client. It always show
up as
"Unable to create channel IAX2 (Cause 20 Unknown)

I am using Asterisk 1.8.7.1

CK
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On Sun, 23 Oct 2011, asterisk asterisk wrote:
> I used to use Zoiper IAX to connect to my asterisk server from remote 
> site. On asterisk CLI, I can see my zoiper client registered and stay on 
> line. HOwever, I don't know why now I can't call this client. It
always
> show up as "Unable to create channel IAX2 (Cause 20 Unknown)
If you enable IAX debugging you may get some clues.

-- 
Thanks in advance,
-------------------------------------------------------------------------
Steve Edwards       sedwards at sedwards.com      Voice: +1-760-468-3867 PST
Newline                                              Fax: +1-760-731-3000