How to keeping multiple instances of a class from f$&#ing with each other

1

I seem to have a slight problem in this small part of my class. I omitted the rest because it all works fine, and I’m sure it’s not part of the problem.

I have three instances of this class, enemy7,8,9,10. Enemy 7 just sits there and does nothing, while 8,9, and ten all activate at the same time…


dynamic class enemyPlane extends MovieClip {
    public var flightSpeed:Number;
    public var speed:Number;
    public var fallSpeed:Number;
    public var smokePoint:Number;
    public var conSpeed:Number;
    public var active:Boolean;
    public var startPos:Number;
    public var i:Number;
    public var k:Number;
    public function rotation2D(r) {
        return r*180/Math.PI;
    }
    public function onLoad() {
        this.swapDepths(this._x+30000);
        //Variables
        startPos = _x;
        this.life = 25;
        flightSpeed = 14;
        speed = 0;
        smokePoint = -55;
        conSpeed = -3;
        active = false;
        i = 0;
        k = 0;
        fallSpeed = 0;
    }
    function onEnterFrame() {
        //Flight control
        speed += flightSpeed;
        //Activate plane when player near
        if (_root.ground0._x-startPos<3000 & this.active == false) {
            speed = 0;
        } else {
            active = true;
        }
        this._x = startPos+_root.landMove+speed;