Using papervision in flash builder and getting TypeError: Error #1009: when using object.pitch(5)

Question

When i use papervision in flash builder and i am doing a test, when i render a sphere using papervision with the following code it renders me the sphere.
When i add a line sphere.pitch(2);      ||
sphere.yaw(2);
sphere.roll(2);
i get the following error,
TypeError: Error #1009: Cannot access a property or method of a null object reference.
at PvTest/onRenderTick()[D:\Android 3D\PvTest\src\PvTest.as:39]
Can anyone help me figure out the error
For additional Info, these are the imports i am doing:
import org.papervision3d.objects.primitives.Sphere;
import org.papervision3d.view.BasicView;

Answer 1

I followed the steps and read some of your comments on the same top topic in another thread. When I put it on the first frame it was okay but the next button on that page had the same problem.  So what I am guessing is that I have to either create a document class or put the actions where the buttons are.  Am I understanding that correctly?  In the other thread in which you helped someone else; there was so comments about document class.  I found a tutorial on it and the way I understand it is that it you can put you actions in an external document.  But you have to include in the event listener the frame in which you want that action to happen.
Thaks for your help.  And patience.