[Asterisk-Users] No ringback on IAX channel after selecting menu option

[Brian Dingman]

Here is the call flow:
[ivr-incoming]
exten => s,1,LookupCIDName
exten => s,2,DigitTimeout(2)
exten => s,3,ResponseTimeout(10)
exten => s,4,Wait(1)
exten => s,5,Background(custom/ivr-incoming)

exten => 1,1,Background(pls-wait-connect-call)
exten => 1,2,Dial(${RINGPHONENUMBERS},20,r)
exten => 1,3,Voicemail,u${VMBOX}
exten => 1,4,Hangup

Running * 1.0.5. The calling party hears the please wait while I
connect your call, but does not hear any ringing. I tried inserting
exten => 1,1,Ringing but that does not work either. 

The same call flow from the pstn DOES generate ringback:
[fromPSTN]
exten => s,1,DigitTimeout(2)
exten => s,2,ResponseTimeout(10)
exten => s,3,Wait(1)
exten => s,4,Background(custom/ivr-greeting)

exten => 1,1,Background(pls-wait-connect-call)
exten => 1,2,Dial(${RINGPHONENUMBERS},15,r)
exten => 1,3,Voicemail,u${VMBOX}
exten => 1,4,Hangup

Any thoughts.