Preload Problem?

1

I have a nice working fade-in/out script, which i try to adapt for loading swfs.
Unfortunately the preloader part does not work, but i dont know why.
I only guess it has to do with the way i have to reference to the loading container(s), which has a new name for every swf to load: MC1, MC2,…

function swapClip() {
 if (currentClip == "undefined" || currentClip._alpha>1) {
  currentClip._alpha--;
 } else {
  currentClip._visible = false;
  if (eval(newOne)._alpha<100) {
   eval(newOne)._alpha++;
  } else {
   if (eval(newOne)._alpha == int(eval(newOne)._alpha)) {
    clearInterval(swapInter);
    currentClip = newOne;
   } else {
    eval(newOne)._alpha += 15;
   }
  }
 }
}
for (var i = 1; i<=4; i++) {
 var ref:MovieClip = this.NAVI["BTN"+i];
 ref.ID = i;
 ref.onRollOver = function() {
  if (this != _root.clicked) {
   this.gotoAndStop("OVER");
  }
 };
 ref.onRollOut = ref.onReleaseOutside=function () {
  if (this != _root.clicked) {
   this.gotoAndStop("UP");
  }
 };
 for (var j = 1; j<=4; j++) {
  this["MC"+j].id = j;
  ref.onRelease = function() {
   if (this != _root.clicked) {
    if (this.ID == 1) {
     createEmptyMovieClip("MC1", 1);
     MC1.loadMovie("SWF1.swf", 10);
     ladestatus();
     MC1._alpha = 0;
     MC1._x = 0;
     MC1._y = 0;
     currentClip = newOne;
     clearInterval(swapInter);
     newOne = MC1;
     swapInter = setInterval(swapClip, 5);
 
    }
    if (this.ID == 2) {
     createEmptyMovieClip("MC2", 2);
     MC2.loadMovie("SWF2.swf", 10);
     ladestatus();
     MC2._alpha = 0;
     MC2._x = 0;
     MC2._y = 0;
     currentClip = newOne;
     clearInterval(swapInter);
     newOne = MC2;
     swapInter = setInterval(swapClip, 5);
 
    }
    if (this.ID == 3) {
     createEmptyMovieClip("MC3", 3);
     MC3.loadMovie("SWF3.swf", 10);
     ladestatus();
     MC3._alpha = 0;
     MC3._x = 0;
     MC3._y = 0;
     currentClip = newOne;
     clearInterval(swapInter);
     newOne = MC3;
     swapInter = setInterval(swapClip, 5);
 
    }
    if (this.ID == 4) {
     createEmptyMovieClip("MC4", 4);
     MC4.loadMovie("SWF4.swf", 10);
     ladestatus();
     MC4._alpha = 0;
     MC4._x = 0;
     MC4._y = 0;
     currentClip = newOne;
     clearInterval(swapInter);
     newOne = MC4;
     swapInter = setInterval(swapClip, 5);
 
    }
 
    this.gotoAndStop("PRESS");
    _root.clicked.gotoAndStop("UP");
    _root.clicked.useHandCursor = true;
    _root.clicked = this;
    this.useHandCursor = true;
   }
  };
 }
}
loader._visible = false;
//-------------------------------------------------
preload = function () {
 loader.onEnterFrame = function() {
  loaded = this["MC"+j].getBytesLoaded();
  totoload = this["MC"+j].getBytesTotal();
  if (loaded>=10) {
   loader._visible = true;
   percent = Math.round(loaded/totoload*100);
   this.prozentanzeige.text = percent+" % geladen";
   this.balken._xscale = percent;
   if (percent>=100) {
    delete this.onEnterFrame;
    this._visible = false;
   }
  }
 };
};
//-------------------------------------------------
stop();

Thanks for help!