I'm also having a similar problem. Can you shed any light?
I'm sure it's a stupid scope issue, but it's driving me mad today.
I've got a prebuilt mc that has a bunch of movieclips inside of it.
I've then attached the prebuilt mc to the stage dynamically at
run-time. For some reason, the instanced mc's inside of it won't
respond. Here's my code below. What am I missing?