Problem:
--------
I dial the dialin number, it reads up teh first sound file,
i try press 1, i try press 2. nothing happens then hangs up.

Here is the Context the dialin number goes to:
------------------------------------
[incoming]

exten => s,1,Answer
exten => s,2,Background(conf-usermenu)
exten => s,3,WaitExten
exten => 1,1,Playback(tt-monkeys)
exten => 2,1,Playback(hello-world)
exten => t,1,Hangup
exten => i,1,Playback(custom/invalid-option)
exten => i,2,Goto(s,2)


This is the log for the incoming call:
------------------------------------

    -- Executing [s@incoming:1] Answer("SIP/67.15.180.14-0817f858", "") in new stack
    -- Executing [s@incoming:2] BackGround("SIP/67.15.180.14-0817f858", "conf-usermenu") in new stack
    -- <SIP/67.15.180.14-0817f858> Playing 'conf-usermenu' (language 'en')
    -- Executing [s@incoming:3] WaitExten("SIP/67.15.180.14-0817f858", "") in new stack
    -- Timeout on SIP/67.15.180.14-0817f858, going to 't'
    -- Executing [t@incoming:1] Hangup("SIP/67.15.180.14-0817f858", "") in new stack
  == Spawn extension (incoming, t, 1) exited non-zero on 'SIP/67.15.180.14-0817f858'

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