Timelined object with classpath

if a object already exists(not created dynamically) on the time-line how do i reference its instance name
im loading the class like this

class is (Scene.as)
var Scene2:Sprite = new Scene()

and its extending Sprite

I’ve also tried extending movie clip and that didn’t appear to help,

is the extend part what gives it the reference to the time-line of the script that initiated it, or was i way off?