Getting emacspeak to stop talking

Hi all, 

I'm a new emacspeak user, and I really like the software *except* for
one problem: when it decides to speak a buffer, nothing I do can stop
it (except killing the emacs). I've tried the C-e s (dtk-stop)
command, and it doesn't appear to do anything. This is a problem, eg,
when I run file-completion on a large buffer. Is there some variable I
need to set to tell emacspeak that it should stop talking when

	-jen mankoff

	       Jen Mankoff jmankoff@cc.gatech.edu