Subs need to be transparent on start-up

programming flash
1

http://www.gobrowncow.com/hannah/engulf/index.htm

I’m almost finished with this site, but have one last problem. All the sub menus should be transparent when the page opens but the two on the right are visible and I don’t know why. What am I missing in my actionscript?

import mx.transitions.Tween;

var myTween:Tween;
var myTween2:Tween;
var myTween3:Tween;

newSub_mc.worship_btn.enabled = false;
newSub_mc.snapshot_btn.enabled = false;
newSub_mc.location_btn.enabled = false;
newSub_mc.getengulfed_btn.enabled = false;

projectSub_mc.current_btn.enabled = false;
projectSub_mc.past_btn.enabled = false;
projectSub_mc.missions_btn.enabled = false;
projectSub_mc.volunteer_btn.enabled = false;

discoverSub_mc.mission_btn.enabled = false;
discoverSub_mc.adults_btn.enabled = false;
discoverSub_mc.children_btn.enabled = false;
discoverSub_mc.music_btn.enabled = false;
discoverSub_mc.staff_btn.enabled = false;
discoverSub_mc.give_btn.enabled = false;

new_btn.onRollOver = function () {
newSub_mc.worship_btn.enabled = true;
newSub_mc.snapshot_btn.enabled = true;
newSub_mc.location_btn.enabled = true;
newSub_mc.getengulfed_btn.enabled = true;
myTween = new Tween(newSub_mc,"_alpha",Regular.easeOut,0,100,1,false);
projectSub_mc._alpha = 0;
discoverSub_mc._alpha = 0;
}

project_btn.onRollOver = function () {
projectSub_mc.current_btn.enabled = true;
projectSub_mc.past_btn.enabled = true;
projectSub_mc.missions_btn.enabled = true;
projectSub_mc.volunteer_btn.enabled = true;
myTween2 = new Tween(projectSub_mc,"_alpha",Regular.easeOut,0,100,1,false);
discoverSub_mc._alpha = 0;
newSub_mc._alpha = 0;
}

events_btn.onRollOver = function () {
projectSub_mc._alpha = 0;
newSub_mc._alpha = 0;
discoverSub_mc.alpha = 0;
}

discover_btn.onRollOver = function () {
discoverSub_mc.mission_btn.enabled = true;
discoverSub_mc.adults_btn.enabled = true;
discoverSub_mc.children_btn.enabled = true;
discoverSub_mc.music_btn.enabled = true;
discoverSub_mc.staff_btn.enabled = true;
discoverSub_mc.give_btn.enabled = true;
myTween3 = new
Tween(discoverSub_mc,"_alpha",Regular.easeOut,0,100,1,false);
projectSub_mc._alpha = 0;
newSub_mc._alpha = 0;
}