Text-to-Speech Loop Behaves Oddly

[Iden Rosenthal]

The following is the script of my button. The idea is to read some  
text from a field and then say it back sentence by sentence. When I  
put the debugger on and step through the script it reads it properly.  
But when I don't have a breakpoint in the script it just reads the  
last sentence in the field.

on mouseUp
   put fld "maintext" into theText
   set the itemDelimiter to "."
   repeat with k = 1 to the number of items in theText
     put item k of theText into theSentence
     revspeak theSentence
   end repeat
   set the itemDelimiter to ","
end mouseUp