Button above another button

1

Hi, I have been struggling with trying to pull off this menu. I want it so when you mouse over where the menu is, a background comes up, then when you mouse over one of the buttons, a highlight comes up to show you are on it. The problem is when I make a button over the background one, the background goes away. I was wondering if there was an easy way to get the background button to not go away once I mouseover on the buttons above it. If this is hard to understand, I have attached my .fla. Thanks in advance.