MC within MC Trouble

The title pretty much speaks for itself, but I’ll elaborate a bit.
I have an MC, which contains some graphics, but also another MC. Let’s call the first MC MC1 and the second one MC2.

I have an instance of MC1 (containing MC2) on my stage. What I want to happen is that when I click on MC2, it triggers an action.
But what happens is: the click is only registered as a click on MC1.

See the example fla attached to this post for an example of what I mean. (Note: obviously this fla does not do what I want it to do.)

Does anyone know how I should do this?

FYI: Changing the hierarchy is not an option, I sort of already have a work around for this problem, but I would very much prefer it if there was a real solution, not just a work around.