Preloading papervision


I’m currently attempting to load a compiled swf that is papervision into another swf via a loader. However, when I do so, I receive that awesome error:

TypeError: Error #1009: Cannot access a property or method of a null object reference.

I am aware that it is trying to load something that isn’t initiated and that’s why it is throwing me this error.

What I don’t know is how to fix it. Is there a better method for preloading a papervision app?

Thanks in advance!