ActionScript3.0 output error. Type Error #1034

Hi everyone, Im creating a navigation menu bar, and have problem in output=)

TypeError: Error #1034: Type Coercion failed: cannot convert flash.text::[email protected] to flash.display.MovieClip.
at Untitled_fla::MainTimeline/mouseOverButton()

my AS3.0 is as following:

[COLOR=red]import gs.;
import gs.plugins.
;
TweenPlugin.activate([BlurFilterPlugin]);

var buttonsArray:Array = new Array(home1Button,aboutus1Button,ourservices1Butto n,ourclients1Button,ourpartners1Button,careers1But ton,contactus1Button);

for (var i:uint = 0; i < buttonsArray.length; i++) {

buttonsArray*.addEventListener(MouseEvent.MOUSE_OVER, mouseOverButton);
buttonsArray*.addEventListener(MouseEvent.CLICK, buttonClicked);

}

buttonBackground.x = home1Button.x;
buttonBackground.y = home1Button.y;

buttonBackground.width = home1Button.width + 10;
buttonBackground.height = home1Button.height + 10;

TweenMax.to(buttonBackground, 0.1, {tint: Math.random() * 0xffffff});

function mouseOverButton(e:Event):void {

var button:MovieClip = (MovieClip)(e.target);


var targetWidth:Number = button.width + 10;
var targetHeight:Number = button.height + 10;


TweenMax.to(buttonBackground, 0.5, {x: button.x, y: button.y,
width:targetWidth, height:targetHeight, tint: Math.random() * 0xffffff});

}

function buttonClicked(e:Event):void {

trace(e.target.name + " was clicked!");

}[/COLOR]

Does anyone know why this comes up or how to get rid of it? Its very urgent for me>.<