Accessing stage instances from within the main constructor class?

Hi my movie is linked to an external class called game, and in the game cosntructor I am trying to access instances on my stage. I have tried MovieClip(root).instancename, root.instancename and even tried adding an event listener to listen when the movie is done loading because I thought maybe it was because the instances on the stage weren’t created before the constructor is ran. What am I doing wrong? This is the main class, shouldn’t it be easy? Thanks :ko: