Controlling Main Timeline from external AS

programming flash
1

This has got me stumped.
The Requirement: To cause the Main Timeline to play(), gotoAndStop(), etc, on command from an AS3 class instance (defined in an external package).
The Situation: Two strategies have worked fine in the IDE (standalone player), but fail when uploaded to a server and run through a browser (IE7).
Strategy 1:
Pass the timeline reference to the constructor (from the main timeline) thus:
myInstance = new myClass(this);
In the constructor use the reference (tl) to call a main timeline function tl.myFunction(param) that calls gotoAndPlay(), etc.
[COLOR=darkred]Result 1:[/COLOR] Works in IDE, fails on-line. :tired:
Strategy 2:

  1. Define a CONST for user-defined events.
  2. Dispatch the events from various places within class (instance) code thus:
    *var result:Boolean = this.dispatchEvent(new Event(MY_EVENT)); *[SIZE=1](‘result’ gets true)[/SIZE]
    Define listeners on the timeline like so:
    myInstance.addEventListener(MY_EVENT,myFunction);
    **[COLOR=darkred]Result 2: [/COLOR]**Works in IDE, fails on-line :{
    What’s going on that either approach works in the IDE, but not in the browser?
    [COLOR=darkgreen]Grateful for any clues.[/COLOR]