Problem with ENTER_FRAME help please

1

Just started migrating and am having problems with the enter frame event.Did a simple rotating star animation with the following code

[COLOR=MediumTurquoise]import flash.events.*;

function rte(event:MouseEvent) {

function rotate(event:Event) {
    m_mc.rotation+=40;
}

m_mc.addEventListener(Event.ENTER_FRAME,rotate);

}

b_mc.addEventListener(MouseEvent.CLICK,rte);

[COLOR=Black]When I press the button (b_mc) more than once the star starts rotating faster every time.What is going on?Doesn’t happen in AS 2.0[/COLOR]
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