Mx 2004 drag and drop with target

Hi all I’ve been looking for a tutorial on how to create drag and drop with a defined target areas. I have seen some code over on another forum but the instructions are far from helpful really, I wondered if anyone could shed some light on where I fail to understand.

The forum link is http://www.flashkit.com/tutorials/Interactivity/Drag_and-Peter_Br-25/index.php

I like this idea because if it isn’t correct then it snaps back to original position and if correctly matched up then the object stays put.

The flash application seems simple enough but the explanation seems to fall short.

The instructions say that for the object which is ‘draggable’, first you should create a movie clip and then you should create button and insert this within the first keyframe of the movie clip.So ok I can create a shape and convert to movie clip but no matter what I do, I’m unable to add a button into keyframe 1 of that movie clip itself?

I have got a button thats exactly the same as the shape and have double left clicked the movie clip itself to make it selectable but when I then try to import my button from the library is always says 'cannot perform this action on an object.

I’ve been trying various things for 30-45 mins with no avail.

Can anyone tell me please where I’m going wrong? I did notice a drag / drop on http://www.kirupa.com/developer/actionscript/dragdrop.htm but it only applies for 2 shapes dragged over the one item.

Are there any suggestions please?

thanks in advance,
Michael