onRollOver - Stopping the who MC activating this

Hey, can you please help?

I have a movieclip with a square in it. The square is duplicated, flipped vertical, mask applied to it - So that it gives a reflection effect.

I’m then attaching this movieclip to the stage and applying a onRollOver function to the movieclip to animate it accordingly.

If I hover of the square it carries out the onRollOver, if I hover over the reflection it also carries out the onRollOver.

How can I have just the square activating the onRollOver and not the reflection within the same movieclip?

Cheers :D!