Help with class

programming flash
1

Hi there, I have a problem with a class, I don’t know how to make it work, mainly because I’m new at using classes.

This is the class sounds.as:

package {
    import flash.events.*;
    import flash.media.Sound;
    import flash.media.SoundChannel;

    public class sounds {
        public function sounds():void {
            addEventListener(KeyboardEvent.KEY_DOWN, keys);
            trace("class is working")
        }
        public function keys(e:KeyboardEvent):void {
            if (e.keyCode == 37) {
                trace("pressed");
            }
        }
    }
}

I know you may think it has nothing to do with sounds, but I’m just testing it before putting the real code. And the keys functions is because I will need to do something with keys so I’m just testing it.

My problem is:
If I put import sounds; in the main timeline, nothing happens. If I put sounds.sounds() (so the sounds function located inside the sounds class is called) I have a compiler error which says:

1180: Call to a possible undefined method addEventListener
The source is addEventListener(KeyboardEvent.KEY_DOWN, keys);

So basically, what I need is to make the class work. I mean, how to import it and solve that compiler error.

Thanks a lot.