Ayuda con galeria flash y xml boton next / prev

[poto]

Hola amigos tengo este código pero no logro hacer funcionar el botón adelante atras de la galería, seguramente es algo muy simple pero no encuentro la solución

Código HTML:

System.useCodepage = true;

var tnNr;
spacing = 20;
container._alpha = 0;
var curLength;
var cur;
info.autoSize = true;
MovieClip.prototype.loadPic = function(pic, id) {
	info.text = "";
	this._alpha = 0;
	this.loadMovie(pic);
	cur = pic;
	temp = this._parent.createEmptyMovieClip("temp2", 998);
	temp.onEnterFrame = function() {
		var t = container.getBytesTotal(), l = container.getBytesLoaded();
		cont1.bar._visible = 1;
		cont1.per = Math.round((l/t)*100);
		if (Math.round(l/t) == 1 && container._width != 0 && container._height != 0) {
			var w = container._width+spacing, h = container._height+spacing;
			border.resizeMe(w, h, id);
			cont1.bar._visible = 0;
			delete this.onEnterFrame;
			} else {
			//cont1.bar._width = cont1.per;
			//gives the bar a max width 100 
			info_mc.info.text = per+" % loaded";
		}
	};
};
MovieClip.prototype.resizeMe = function(w, h, id) {
	trace(w);
	var speed = 3;
	container._alpha = 0;
	this.onEnterFrame = function() {
		this._width += (w-this._width)/speed;
		this._height += (h-this._height)/speed;
		if (Math.abs(this._width-w)<1 && Math.abs(this._height-h)<1) {
			this._width = w;
			this._height = h;
			container._x = this._x-this._width/2+spacing/2;
			container._y = this._y-this._height/2+spacing/2;
			container._alpha += 5;
			if (container._alpha>90) {
				info.htmlText = id;
				container._alpha = 100;
				delete this.onEnterFrame;
			}
		}
	};
};
function galleryChoice(q) {
	cur = 0;
	t1Array = new Array();
	pArray = new Array();
	tArray = new Array();
	iArray = new Array();
	my_xml = new XML();
	for (var j = 0; j<curLength; j++) {
		this.th_nav["thmb"+j].removeMovieClip();
	}
	my_xml.ignoreWhite = true;
	my_xml.onLoad = function(loaded) {
		if (loaded) {
			gallery = this.firstChild.childNodes[q];
			curLength = gallery.childNodes.length;
			for (var i = 0; i<gallery.childNodes.length; i++) {
				titulo.titulo_txt = gallery.attributes.titulo;
				pArray.push(gallery.childNodes[i].attributes.source);
				tArray.push(gallery.childNodes[i].attributes.titulo);
				iArray.push(gallery.childNodes[i].attributes.title);
			}
		}
		delay = setInterval(makeButtons, 50);
	};
	my_xml.load("gallery.xml");
}

if (titulo.titulo_txt.htmlText == "" || titulo.titulo_txt.htmlText == "undefined") {
titulo._visible = false;
} else {
titulo.play();
}

function makeButtons() {
	tnNr = 0;
	cur = 0;
	clearInterval(delay);
	for (var i = 0; i<tArray.length; i++) {
		var thb = th_nav.thmb.duplicateMovieClip("thmb"+i, 1000+i);
		thb.id = i;
		thb._x = i%1*100;
		thb._y = Math.floor(i/1)*18;
	}
	loadButtons();
}
function loadButtons() {
	var tbox = th_nav["thmb"+tnNr];
	th_nav["thmb"+tnNr].titulo_mc.bt_titulo.text=(tArray[tnNr]);
	temp = this.createEmptyMovieClip("tmp"+tnNr, 999);
	temp.onEnterFrame = function() {
		bt = tbox.getBytesTotal();
		bl = tbox.getBytesLoaded();
		if (bl != bt)
		//Si todavía no cargo el picture
		{
		porcentaje_mc._visible = true;
		porcentaje_mc.porcentaje.text = "CARGANDO "+(tnNr+1)+" DE "+tArray.length;
		}
		else
		//Si ya cargo el picture
		{
		porcentaje_mc._visible = false;
		}
		if (bt == bl && bt>4) {
			nextButton();
			delete this.onEnterFrame;
		}
	};
}
function nextButton() {
	if (tnNr<tArray.length-1) {
		tnNr++;
		loadButtons();
	} else {
		activateButtons();
	}
}
function activateButtons() {
	mainButtons();
	for (var i = 0; i<pArray.length; i++) {
		var but = th_nav["thmb"+i];
		but.id = i;
		but.onRelease = function() {
			container.loadPic(pArray[this.id], iArray[this.id]);
			disButtons2(this.id);
		};
		but.onRollOver = function() {
			this.titulo_mc.play();
		};
		but.onRollOut = function() {
			this.titulo_mc.gotoAndStop("activo");
		};
	}
	container.loadPic(pArray[0], iArray[0]);
	disButtons2(0);
}
var butArray:Array = ["but1", "but2", "but3"];
function mainButtons() {
	for (var i = 0; i<butArray.length; i++) {
		this[butArray[i]].id = i;
		this[butArray[i]].onRelease = function() {
			galleryChoice(this.id);
			disButtons(this.id);
		};
	}
}

function disButtons2(d) {
	for (var i = 0; i<tArray.length; i++) {
		if (i != d) {
			this.th_nav["thmb"+i].enabled = true;
			this.th_nav["thmb"+i].titulo_mc.gotoAndStop("activo");
		} else {
			this.th_nav["thmb"+i].enabled = false;
			this.th_nav["thmb"+i].titulo_mc.gotoAndStop("inactivo");
		}
	}
}
function disButtons(d) {
	for (var i = 0; i<butArray.length; i++) {
		if (i != d) {
			this[butArray[i]].enabled = true;
			this[butArray[i]].gotoAndStop("activo");
		} else {
			this[butArray[i]].enabled = false;
			this[butArray[i]].gotoAndStop("inactivo");
		}
	}
}
disButtons(0);
galleryChoice(0);

prevb.onRelease = function() {
	cur--;
	if (cur<0) {
		container.loadPic(curLength-1);
	} else {
		container.loadPic(cur);
	}
};
nextb.onRelease = function() {
	cur++;
	if (cur>curLength-1) {
		container.loadPic(0);
	} else {
		container.loadPic(cur);
	}
};

Desde ya saludos y espero de algún alma caritativa que me ayude.