Class / Linkage, interference?

Hi.

I have this code to place my MC in the stage:

var circle:GreenBall = new GreenBall();
addChild(circle);

But then the linkage of my GreenBall is “classes.dragndrop.GreenBall”, not just GreenBall because of my defined classes…

I’m studying AS3 for the first time, and I can’t figure out how to fix this?

Thanks for the help