Can a modal stack appear with visual effect ?

[Martin Blackman]

Hi there,
I simply wanted my 'About' stack to appear with a little pizzazz, but
I can't get visual effects working on a modal stack

   set the style of stack "stack2" to modal
   lock screen
   go stack "stack2"
   unlock screen with visual effect wipe down

Only if I set the style to toplevel does the effect work.
I also tried this to no avail -

  set the style of stack "stack2" to modal
  go invisible stack "stack2"
  lock screen
  show stack "stack2"
  unlock screen with visual effect wipe down

regards
Martin