Animate a Movieclip in AS3 with Tweener by MouseOver and MouseOut

I have 4 buttons, when I roll over a button it needs to fade-in a text on stage. When I roll-out it needs to fade out the text.
I did the fade-in and fade-out with the tweener class, but it only works 1 time, after that, the instance of the text stays on stage and doesn't fade-out anymore.

I don't want to do this with the timeline in the MovieClip, because I need more control over the MovieClip.

This is the script I already have, like I said, it only works once. Can someone tell me what I'm doing wrong?

nav.zwembaden.addEventListener(MouseEvent.MOUSE_OVER, zwembaden_MOUSEOVER);
nav.zwembaden.addEventListener(MouseEvent.MOUSE_OUT, zwembaden_MOUSEOUT);
 
function zwembaden_MOUSEOVER(e:MouseEvent):void
{
	var mcLink:MovieClip = new mc_links();
	mcLink.linktext.text = "ZWEMBADEN";
	mcLink.name = "mcLink_zwembaden";
	addChild(mcLink);
	mcLink.alpha = 0;
	mcLink.blendMode = BlendMode.LAYER;
	Tweener.addTween(mcLink, {alpha:1, time:1, transition:"easeInSine"});
}
 
function zwembaden_MOUSEOUT(e:MouseEvent):void
{
	Tweener.addTween(getChildByName("mcLink_zwembaden"), {alpha:0, time:1, transition:"easeInSine"});
        //stage.removeChild(stage.getChildByName("mcLink_zwembaden"));
}

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