How to stop an externally loaded swf clip?

[FONT=Times New Roman][SIZE=3]Basically what I am doing is employing a reusable preloader. You have a screen, several buttons on it, you click a button and a swf clip is externally loaded onto the screen. The problem is the clip is looped and once loaded doesn’t stop, unless you load another movie. So I have writen some script to prevent that and show the clip only once. I have underlined that part of the script. However, for some reason inclusion of this part of the script prevent a swf clip to get loaded in the first place… Any ideas? If you need any other info please tell me. Thanks!!![/SIZE][/FONT]
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The Script

MovieClip.prototype.fadeIn = function() {

this.onEnterFrame = function() {

if (this._alpha<100) {

this._alpha += 10;

} else {

delete this.onEnterFrame;

}

};

};

clip_preloader._visible = false;

loading_text02._visible = false;

var empty = this.createEmptyMovieClip(“container”, “100”);

empty._x = 240;

empty._y = 263;

my_mc = new MovieClipLoader();

preload = new Object();

my_mc.addListener(preload);

preload.onLoadStart = function(targetMC) {

trace("started loading "+targetMC);

container._alpha = 0;

clip_preloader._visible = true;

loading_text02._visible = true;

};

preload.onLoadProgress = function(targetMC, lBytes, tBytes) {

clip_preloader._width = (lBytes/tBytes)*100;

};

preload.onLoadComplete = function(targetMC) {

container.fadeIn();

loading_text02._visible = false;

clip_preloader._visible = false;

trace(targetMC+" finished");

};

[U]preload.onLoadInit = function(targetMC) {

targetMC.onEnterFrame = function() {

if (this._currentframe == this._totalframes) {

this.stop();

delete this.onEnterFrame;[/U]

}

};

};

//default image

my_mc.loadClip(“default.jpg”, “container”);

//buttons

slot01.onPress = function() {

my_mc.loadClip(“clip01.swf”, “container”);

};

slot02.onPress = function() {

my_mc.loadClip(“clip02.swf”, “container”);

};

slot03.onPress = function() {

my_mc.loadClip(“clip03.swf”, “container”);

};