Communication between classes

Hey…

Well… i have another problem…
I can’t call a function within a document class from another document class whose movie is loaded inside this first “document class”.
So that you can better picture my problem, here is a sketch

Well this is the main problem…

Second problem… i did solve it but i am still wondering if there is a better way… so… i have a FLA file… and two classes (ClassOne, ClassTwo)… i create an instance of both clases in my main FLA, now i would like to call a function form one class in another…
i did it this way… in my FLA i gave a name form document class… Main, and than in ClassTwo i called: Main(parent).instanceNameOfClassOne.functionName();
Is it possible to just call class directly… like:
form ClassTwo: ClassOne.functionName();

I hope someone will enlighten me
thank you in advance…
J.