Message missing from alert box & Can you disable everything until user selects an answer?

Question

Question 1 - My alert box window is working, and the title and buttons function as they should, but does anyone know why my message is not showing up?
Question 2 - How do you program the alert box window so that no other buttons on your application work until the user selects one of your alert window buttons? I can do this manually by setting everything to enabled = false, but I know this happens automatically every other time I've used the alert window component, but it's not working for me now.
Question 3 - How can I prevent multiple alert windows from popping up? My alert comes up when a user clicks a button called 'Delete'. Would be solved if I had the answer to question 2.
var myMess:String = '';
var myTitle:String = '';
function confirmDelete(){
    selectedAlt = list_dg.selectedItem.ALT_CODE;
    myMess = "Are you sure you want to delete this ALT code: "+selectedAlt+"?";
    myTitle = "Confirm Delete ALT Code Function                                                    ";
    var alertBox:Object = Alert.show(myMess,myTitle,Alert.YES|Alert.NO,this,deleteConfirmHandler);
    alertBox.setSize(450, 125);
// HANDLER FOR CONFIRM DELETE ALT ALERT WINDOW
deleteConfirmHandler = function(evt_obj:Object):Void {   
    var myAnswer = evt_obj.detail;
    // returns 1 if yes, 2 if no.
    if (myAnswer == 1){
            deleteAlt();
    else {   
        altDetail.moveAssign_btn.enabled       = false;
        altDetail.moveAvail_btn.enabled        = false;
        altDetail.avail_list.selectedIndex     = null;
        altDetail.assigned_list.selectedIndex  = null;

Answer 1

I think you were on the right track, it did have something to do with the parent fla file. Once I complied it's parent file (and imported the window and alert classes into the parent), my message appeared in the alert box.
It doesn't make any sense, because the component is not in the parent file, it's in the sub-parent fla file, but I guess you just have to compile all the files in the hierarchy for it to work... It also doesn't make sense why everything else worked before (the title, the yes and no buttons) except for the message.
Thanks for the suggestion (to look at the depths, etc), however, I'm still unable to understand why the alert is not modal as it should be. If anyone has any suggestions on how to fix the buttons to make them modal, please let me know. Thanks.