setInterval madness!

1

Hey there… wondering if anyone can help me!

Im making a space game and so far so good however, im currently programming the AI and strangely when i call the ‘shoot laser’ function with ‘setInterval’ the lasers doesnt positon correctly (0, 0) / wrong colour etc, however if i call the function ‘shoot();’ it works perfectly. I know i could just knock up a few incrementing vars to get the same effect but i would like to really get the setInterval working!.. here is my code for that class :}

TY in advance!

import flash.filters.GlowFilter;

class turret extends MovieClip
{
    //variables
    private var speed:Number = 0.050;
    private var angle:Number;
    private var dx:Number;
    private var dy:Number;
    private var colour:Number = 0x0099FF;
    private var sDelay:Number = 2000;
    private var pCount:Number = 1;
    private var accuracy:Number = 5;
    private var lspeed:Number = 16;
    private var shootem:Object;
    private var laser:MovieClip;
    private var lcolour:Color;

    //constructer
    public function turret()
    {
        this._x = Stage.width/2;
        this._y = Stage.height/2;
        this.filters = [new GlowFilter(colour, 0.75)];

        //prepare sounds
        //
        //
        //

        //set intervals
        shootem = setInterval(shoot, sDelay);
    }
    //calculate movement, rotation etc
    private function onEnterFrame():Void
    {
        dx = _root.player._x-this._x;
        dy = _root.player._y-this._y;
        angle = Math.atan2(dy, dx)*180/Math.PI;
        this._rotation = angle;
    }
    //shoots laser
    private function shoot():Void
    {
        laser = _root.sourceMC.attachMovie("laser", "plaser"+pCount++, _root.sourceMC.getNextHighestDepth());
        laser._x = this._x;
        laser._y = this._y;

        lcolour = new Color(laser);
        lcolour.setRGB(colour);
        laser.filters = [new GlowFilter(colour, 0.80)];

        laser.angle = angle+Math.random()*(accuracy-(accuracy*-1)+1)-accuracy;
        laser._rotation = laser.angle;
        laser.dx = Math.cos(laser.angle*Math.PI/180)*lspeed;
        laser.dy = Math.sin(laser.angle*Math.PI/180)*lspeed;

        //move laser
        laser.onEnterFrame = function():Void 
        {
            this._x += this.dx;
            this._y += this.dy;

            //removes lasers off-stage
            if (this._x>_parent.player.right+this._width/2) {
                this.removeMovieClip();
            } else if (this._x<_parent.player.left-this._width/2) {
                this.removeMovieClip();
            }
            if (this._y>_parent.player.bottom+this._width/2) {
                this.removeMovieClip();
            } else if (this._y<_parent.player.top-this._width/2) {
                this.removeMovieClip();
            }
        };
    }
}