QUICK help on mouse over events on MC's HELP!

basically i have 6 movie clips, each movie clip plays its role as a button (home, about us, ministries, media, etc)…and when the mouse rolls over each MC (about us, ministires and media), a set of buttons come out so u can click wher eu want to go…now when my mouse pointer is currently on “about us” mc and the menu comes out, when i put my mouse pointer to “ministries” mc which is right next to it, sometimes the “about us” mc doesnt go back to normal, the menu doesnt go away…can someone please help me … ive attached the file if u can please help me out…thank u!

on scene 1, each layer i have this script:
[indent]about.onRollOver = roll;
function roll() {
delete this.onRollOver;
this.onEnterFrame = function() {
if (!this.hitTest(_xmouse, _ymouse, false)) {
this.onRollOver = roll;
delete this.onEnterFrame;
[/indent] then its ministries.onrollover and media.onrollover…

is there one more script i need to add or sumthin someone please help