Preloader completes but object is still null

I have searched forums and google but still with no success. My problem is that after loader being 100% complete, i am trying to access some objects on stage(dragged to there from library) but compiler says that the object is null, and seems to me like it has not loaded yet. I know (tested it with onenterframe event) that second later, if i try to access the object with same line of code and same place, i can access it and it is not null anymore. Very strange, am i doing anyhting wrong?

All code is on .as file which is also the main class.