asterisk users - Jan 2005 - Issue using IAX2 as end-point (IAXComm)

Hello,

I am attempting to use IAXComm as an end-point for my
Asterisk instance.  I have setup an entry in MySQL
(using RealTime configuration) and am able to dial-out
with no problem, although I notice this notice on the
console of Asterisk:

Jan 18 21:01:53 NOTICE[22491]: chan_iax2.c:4307
register_verify: No registration for peer '10000'
(from 27.21.26.2)

I then issue this Dial cmd:

IAX2/10000&SIP/${JASON}&SIP/${OFFICE}&SIP/${LAPTOP}|20|tT

But get this when I attempt to receive a call:

Jan 18 21:04:44 WARNING[22491]: chan_iax2.c:2320
create_addr: No such host: 10000
Jan 18 21:04:44 NOTICE[22491]: app_dial.c:809
dial_exec: Unable to create channel of type 'IAX2'
(cause 3)

Any ideas?  I am trying to use IAX when traveling to
avoid firewall issues.  Thanks!

Jason