Controlling movieclip through button

Dear all,
I'm experiencing some problems with what I would have thought
to be relatively simple in Flash 8.0. I would like to control a
movieclip through a button.
I have found some tutorials on the web but I couldn't manage
to get anything working completely. As I understand you add a
button and a movieclip and name both instances. The actionscript
for the button should be something like:
on (release) {
butterfly-mc.stop();
This seems to work, but when I add a second button which
should start again, using butterfly-mc.start();, it just won't
start again.
I'm thinking this might be some kind of scoping problem
(defining some local actions directly on the movieclip seems to
work fine) and the .stop() might be stopping the complete animation
but this is a long shot and I don't know how I could verify or
overcome this.
This is my first project in Flash so any hints would be very
welcome!
Best,
Joris

@adobe: if i put the button instance in a another container
(example: _root.somemc.mybutton) the code runs in normal context
and "this" returns really "the instance i have clicked"... -
is it a Bug or i'm a Idiot ;)
@Joris:
put your instance's to stage - give them the Names you want
and write your code somewhere on the main timeline as follow (for
the button):
mybutton.onRelease = function():Void{
this._parent.butterflymc.stop();
"mybutton" is the instanceName of your Button
and everthing will be ok ;)...
Sorry for my bad english... i hope someone can understand my
question.

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