Using 1 button to control multiple movieclips

[sazap10]

This is my source file http://www.megaupload.com/?d=FUTZLIQL
i have two buttons on the root called Up and Down these buttons are used to control 6 different menu items but when 1 of the movie clips it loaded it works but when the others are loaded after it they dont work.

below is a screenshot of menu which i am trying to get to work


i have code to navigate for each of the subs menus for the main icons.
this is the code:
_root.Up.onRelease = function() {
prevFrame();
};
_root.Down.onRelease = function() {
nextFrame();
};

it works for the first submenu but when i try the second menu to work it doesnt.

any idea why?