asterisk users - Aug 2004 - System freezes when using Festival with usecache

I am using Festival to synthesize some menu Interaction with a caller 
and am having a problem. 

What I am working on is a remote callback where I can remotely call in 
to an extension, and enter a callback number (or use the CALLERID info)  
and a second outbound dialing number to connect to. 

Things work O.K. until I set usecache=yes in festival.conf.   After 
doing this, things run well for the first two or three Festival 
Commands, then the call to locks up.  Here is a copy of my festival.conf 
file that causes this behavior. 

The dialplan logic works OK otherwise (ultimately I will probably 
convert this to AGI).    Also I have included a copy of what I am doing 
in my extensions.conf to possibly give some insight.   Any help is 
appreciated.

festival.conf
[general]
host=localhost
port=1314
usecache=yes
cachedir=/var/lib/asterisk/festivalcache/
festivalcommand=(tts_textasterisk "%s" 'file)(quit)\n


from extensions.conf
exten => 4998,1,Answer
exten => 4998,2,SetVar(YourNumber=1${CALLERIDNUM})
exten => 4998,3,Goto(6)
exten => 4998,4,Festival(Caller please enter the callback number 
followed by the pound key)
exten => 4998,5,Read(YourNumber)
exten => 4998,6,Wait(1)
exten => 4998,7,Festival(Caller please verify your callback number)
exten => 4998,8,SayDigits(${YourNumber})
exten => 4998,9,Wait(1)
exten => 4998,10,Festival(Caller press 1 to use this number press 2 to 
repeat the number press 3 to enter a new number)
exten => 4998,11,Read(Result,,1)
exten => 4998,12,GotoIf($[${Result} = 1]?15:13)
exten => 4998,13,GotoIf($[${Result} = 2]?7:14)
exten => 4998,14,GotoIf($[${Result} = 3]?4:10)
exten => 4998,15,Festival(Caller please enter the outbound number 
followed by the pound key)
exten => 4998,16,Read(TheirNumber)
exten => 4998,17,Wait(1)
exten => 4998,18,Festival(Caller you have entered)
exten => 4998,19,SayDigits(${TheirNumber})
exten => 4998,20,Wait(1)
exten => 4998,21,Festival(Caller if this is correct press 1 otherwise 
press 2)
exten => 4998,22,Read(Result,,1)
exten => 4998,23,GotoIf($[${Result} = 1]?25:24)
exten => 4998,24,GotoIf($[${Result} = 2]?15:21)
exten => 4998,25,Wait(1)
;place a call in asterisk/outgoing before hangingup
exten => 4998,26,System(/bin/nohup /usr/local/bin/connect ${YourNumber} 
${TheirNumber} 30&)
exten => 4998,27,Wait(1)
exten => 4998,28,Festival(Caller this session is completed please hanup now)
exten => 4998,29,Wait(1)
exten => 4998,30,Hangup