Loading External SWF w/ Stage reference in class

I’m unable to load forces.swf (assume I can’t edit it, as I don’t have the source code) through an external swf, due to Stage reference in the base class.

How would I go about loading it (and any other possible SWF) without errors being thrown?

Here is a link to the problem I am trying to fix:

http://www.mediafire.com/?9d9qay8a6xj7836

Thanks.