Making MCs more sticky

Hi there.

I’m looking to make my MC’s (acting as buttons) more sticky.

What I mean by ‘sticky’ is to enable Rollover effect to hold if the user tries to click on the link within what is revealed onRollover (in my example it’s ‘sub-inline text link’)

Currently. The hit area of the MC’s do not allow me to mouse over those links within. I can’t simply enlarge the hit areas of the MCs because they will ultimately be tightly spaced from one another.

Example file:

Your help is greatly appreciated. Thanks in advance.