asterisk users - Jun 2004 - IAXTel Help

I've searched WIKI and Archives but nothing.

Im getting:

 -- Called username:password@iaxtel.com/1800somenumber@iaxtel
Jun 21 17:04:12 WARNING[1158883520]: chan_iax2.c:5097 socket_read: Call 
rejected by 69.73.19.178: Unable to negotiate codec
    -- Hungup 'IAX2[Iaxtel]/8'
  == No one is available to answer at this time
    -- Executing Hangup("SIP/104-b8eb", "") in new stack
  == Spawn extension (home, h, 1) exited non-zero on 'SIP/104-b8eb'

IAX.CONF

[general]
port=5036
register => mynumber:password@iax2.fwdnet.net
register => khagan:spider1@iaxtel.com
disallow=all
allow=ulaw


[iaxfwd]
type=user
context=fromiaxfwd
;context=local
deny=0.0.0.0/0.0.0.0
permit=65.39.205.0/255.255.255.0

[Iaxtel]
type=friend
host=iaxtel.com
secret=password
auth=rsa
context=from-iaxtel
inkeys=iaxtel

Please help me. Im working with IAX FWD. Tried putting different codec's in.
extension.conf is as it said to setup.

Kyle

Kyle Hagan wrote:
> I've searched WIKI and Archives but nothing.
>
> Im getting:
>
> -- Called username:password@iaxtel.com/1800somenumber@iaxtel
> Jun 21 17:04:12 WARNING[1158883520]: chan_iax2.c:5097 socket_read: 
> Call rejected by 69.73.19.178: Unable to negotiate codec
>    -- Hungup 'IAX2[Iaxtel]/8'
>  == No one is available to answer at this time
>    -- Executing Hangup("SIP/104-b8eb", "") in new stack
>  == Spawn extension (home, h, 1) exited non-zero on 'SIP/104-b8eb'
>
> IAX.CONF
>
> [general]
> port=5036
> register => mynumber:password@iax2.fwdnet.net
> register => user:password@iaxtel.com
> disallow=all
> allow=ulaw

Had to enable GSM for it to work. No other support? Didnt see anywhere 
that had to use GSM.

Kyle