[asterisk-users] asterisk Channel 'IAX2' unable to transfer

[neu pat]

I've upgraded to to asterisk 11.25.1 (from 1.8).  My local asterisk is
showing it is registered with remote asterisk (same version),
But when I try to make a call I get:


iax2 show registry
Host                  dnsmgr  Username    Perceived             Refresh  State
192.168.142.1:4569    N       home_serve  192.168.142.7:4569
60  Registered

1 IAX2 registrations.
    -- Accepted AUTHENTICATED TBD call from 10.0.0.108
    -- Accepting DIAL from 10.0.0.108, formats = (ulaw)
    -- Executing [4 at internal:1] Dial("IAX2/iaxy-322-3730",
"IAX2/home_server:546987 at 192.168.141.1/4,30,rw") in new stack
    -- Called IAX2/home_server:xxxxx at 192.168.141.1/4
    -- Call accepted by 192.168.141.1 (format ulaw)
    -- Format for call is (ulaw)
    -- IAX2/192.168.141.1:4569-83 answered IAX2/iaxy-322-3730
    -- Channel 'IAX2/192.168.141.1:4569-83' unable to transfer
    -- Channel 'IAX2/192.168.141.1:4569-83' unable to transfer
    -- Hungup 'IAX2/192.168.141.1:4569-83'
  == Spawn extension (internal, 4, 1) exited non-zero on 'IAX2/iaxy-322-3730'
    -- Hungup 'IAX2/iaxy-322-3730'

Is there something wrong with my dial plan:
exten => 4,1,Dial(IAX2/home_server:xxxxxx@${clinic_server}/${EXTEN},30,rw)

-- 
Regards,
Thelma