how to disable onpress function for one object only

[kofa]

hello

this is my swishmax file




this is my code

onFrame (2) {
    stop();
    var numImages:int = 4; // number of images to load
    var ImagesWidth:int = 200; //number of image width
    var ImagesHeight:int = 250;  // number of image height
    var distanceBetweenImages:int = 5; // distance between each image

    for (var i:Number = 1; i < numImages+1; i++) {
        var img:Object = new Object();
        var mcLoader:MovieClipLoader = new MovieClipLoader();
        mcLoader.addListener(img);   
        img.url = i + ".jpg";   
        // Set the x position of the loaded image
        img.xPos = (i - 1) * (ImagesWidth + distanceBetweenImages);
        // when image not found    
        img.onLoadError = function(target:MovieClip, errorCode:String, httpStatus:Number) {
            target.url = "0.jpg";
            target.mode=false;
            var mcLoader:MovieClipLoader = new MovieClipLoader();
            mcLoader.addListener(this);
            mcLoader.loadClip(target.url, target); 
//==================================================================
              
            //how can i disable onPress function for this image
            
//==================================================================            
        }
        img.onLoadInit = function (target:MovieClip) {
            // Set various properties of the loaded image
            target.mode=true;
            target._quality = "BEST";
            target.smoothing = true;
            target.pixelSnapping = "never";
            target.forceSmoothing = true;
            target._highquality = 2;
            target._width = ImagesWidth;
            target._height = ImagesHeight;
            target._yscale = target._xscale;

            // Set the x position of the loaded image
            target._x = this.xPos;        
            if (target._height > ImagesHeight) {
                target._height = ImagesHeight;
                target._xscale = target._yscale;
            }
             target.onPress = function() {          
                    trace(int(this._name.substr(5,2)));
               }
            
        }

        // Load the image
        mcLoader.loadClip(img.url, this.createEmptyMovieClip("image" + i, i));
    }
} 

my file: https://app.box.com/s/i8pef5hec7kexloxm6c1bmbqf29un968


thanks for help