Populating a nested textbox with a stage variable

Hey Guys,

I've got a textbox nested two symbols deep that I want to populate with a global variable declared on the stage. I've read some posts on the forum about this and haven't had success.

CompReady:

var photoDescription = ""; //set the var as an empty string first

On a Button's mouseUp:

sym.getComposition().getStage().getSymbol("themePopUp").getSymbol("photoDescriptionPopUp") .getSymbol("photoDescriptionText").text(photoDescription);

Any advice?

Best-Mike