Trying to show() and play() a symbol from inside another symbol

Hi Everyone !
I'm running into a problem which is getting me crazy.
I have the following case :
- 1 symbol (_Page_Background) containing an animation with the following trigger @0s :
// Hiding the symbol
sym.getParentSymbol().$("_Page_Background").hide();
// Stop it
sym.stop();
- 1 element (B_TOYS), inside of a symbol (BUTTONS) with the following "click" trigger :
// Showing the _Page_Background symbol
sym.getComposition().getStage().getSymbol("_Page_Background").show();
// Start playing it
sym.getComposition().getStage().getSymbol("_Page_Background").play("INTRO");
The Symbol _Page_Background starts hidden, like it should. But when I click on the button (B_TOYS), nothing happens. Although, everything was working correctly before I turned my buttons into symbols ..
I guess the problems lies with the "show()" function, because I have other buttons that work properly but they don't show/hide anything, they just play()
Am I missing something ?!
Thanks in advance for your kind help !

Hi Dimitri,
Think of symbols as independent timelines that can contain other elements, or instances of other symbols. The Stage/main timeline is a symbol as well. Scripting calls are scoped to the symbol that the script is in. The keyword sym stands for the symbol that you're in with the script.
So if your script is at the same level as what you are targeting with it:
Use sym.$("elementName") to access an element's properties
Use sym.getSymbol("symbolName") to access a symbol's timeline. If there's another symbol inside that symbol that you want to access, you'd use sym.getSymbol("symbolName").getSymbol("childSymbolName")...that's only two levels deep, but you can go as deep as needs be.
If you're trying to access an element in a symbol, you'd combine these two, such as sym.getSymbol("symbolName").$("elementName")
When your script is within a symbol and you want to access an element or symbol outside of the symbol timeline:
Use sym.getParent() to get to any elements that are in the parent symbol (the symbol which contains the symbol you're calling from), which could be the Stage or could be another parent symbol
Use sym.getComposition().getStage() from any symbol level to access things at the main Stage level. You can also dive into a symbol on the Stage from any symbol using sym.getComposition().getStage().getSymbol("symbolName").
All is explained in detail here:
http://www.adobe.com/devnet-docs/edgeanimate/api/current/index.html
hth,
Joe

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