Error #1063: Argument count mismatch

[flamer09]

i cant seems to solve the problem T_T any1 help pls >.<

la.buttonMode = true;
la.addEventListener(MouseEvent.MOUSE_DOWN,int1);
var vx:Number = 5;
function int1():void
{
addEventListener(Event.ENTER_FRAME,onEnterFrame);

}
function onEnterFrame(event:Event):void
{
la.x+=vx;
}

i gt the error:
ArgumentError: Error #1063: Argument count mismatch on Untitled_fla::MainTimeline/int1(). Expected 0, got 1.

[Kingz]

la.buttonMode = true;
la.addEventListener(MouseEvent.MOUSE_DOWN,int1);// Passing the MouseEvent.
var vx:Number = 5;
function int1(evt:MouseEvent):void { // get the event.(evt:MouseEvent)
addEventListener(Event.ENTER_FRAME,onEnterFrame);

}
function onEnterFrame(event:Event):void {
la.x+=vx;
}