Disappearing dialog

[Mark MacKenzie (Shaw)]

I have a simple quit script on a mouseUp handler in a button.

on mouseUp
  answer "Are you sure you want to quit?" with "No" or "OK"
  if it is "OK" then
    quit
 end if
end mouseUp

This works like a charm in the Rev editor environment.  However it will not
work in the Rev player environment.  No dialog appears.  I have checked for
locked messages, etc. and not got anywhere.

Win ME Rev. 1.1

Am I simply doing something wrong here or do I need to look further for  a
bug or other scripting defect?

Regards Mark