Flash Loader Problem

programming flash
1

i create one loader but not work fine …
sees:


loader._alpha = 0;
//#
function preload(file) {
    cont.alphaTo(0,1);
    cont.loadMovie(_global.path + file);
    onEnterFrame = function() {
        var cT:Number = Math.round(cont.getBytesTotal());
        var cL:Number = Math.round(cont.getBytesLoaded());
        var gB:Number = cL/cT*100;
        var lx:Number = ((Stage.width/2) - (loader._width/2));
        var ly:Number = ((Stage.height/2) - (loader._height/2));
        if (cT > cL) {
            loader.tween("_x", lx, 1);
            loader.tween("_y", ly, 1);
            loader.alphaTo(100, 1);
            loader.tx.text = int(gB);
            loader.bar._width = gB;
        } else {
            loader.tween("_x", 10, 1);
            loader.tween("_y", 10, 1);
            loader.alphaTo(0,1);
            cont.alphaTo(100, 1);
            delete onEnterFrame;
        }
    }
}

//---------------------------------- BUT

empresa.tx = "A EMPRESA";
empresa.onRelease = function() {
    preload("empresa.jpg");
};
//#
cases.tx = "CASES";
cases.onRelease = function() {
    preload("cases.jpg");
};

in my opinion the code is certain, but when I compel the archive and when click in the first button it quickly appears the image and soon it disappears and still a click in another button does not function as, preload does not appear normally.

:q:

Help me.