I'm having trouble finding out how to get an MC within another MC to hitTestObject another MC. I've looked it up on different sites but every time I just get an error doing what they say I should.

The problem is, the MC within the MC isn't instantly on the stage. It appears later on within it, and AS3 doesn't seem to think it exists, so I guess i have to do some overly complicated thing to get it to work. Anyone know how to do this?