Flash Pro drop target instance during authoring on the artboard

Question

Developing custom components within Flash Professional CS5.5, I am attempting to implement functionality similar to the way a UIScrollBar can be dropped on a TextArea to bind functionally.
Place a TextArea on the artboard.
Drop a UIScrollBar on to the TextArea.
The UIScrollBar will auto-position itself against the TextArea, and if instance names are not defined, the TextArea will receive a name such as ‘InstanceName_0’ and the UIScrollBar’s scrollTargetName will set to match.
For those familiar with Flashblocks Flash CMS, this functionality is replicated using their Editblock component. The Editblock can be dropped on a component, automatically position itself, and bind instance names.
Following threads and examples, I see mostly historical implementations citing _targetInstanceName and scrollTarget.
Functionally, I understand that this is specifying an instance name which is located from the parent to a DisplayObject.
/** target instance display object. */
protected var scrollTarget:DisplayObject;
/** target instance name, used by authoring to locate display object. */
private var _scrollTargetName:String;
[Inspectable()]
public function set scrollTargetName(value:String):void
    // with try / catch exception handling, but for example:
    scrollTarget = parent.getChildByName(value);
This setter does not fire during authoring.
I’m unsure if I’m missing a specific property name, meta data in the Inspectable tag, an Event, or maybe I am required to extend (Flash Pro’s fl.core) UIComponent?
Are there more current examples / tutorials that anyone could cite?
Please understand that I am not talking about drag-and-drop during runtime. I am speaking about authoring using Flash Professional, dropping components on to each other from Flash Pro’s artboard.
Thanks!

Answer 1

So looking further into things, it seemed to have started happening since I installed Steam. While steams loader was active in the background it would cause the flash audio to drop out. I don't know any reason why it would cause this, but have just disabled steam from starting up at all. Any insight on why these two programs would clash and cause audio issues would be greatly appreciated.
Thanks,
Rob