Particle's in AS3 - actionscript-3

Question

I'm currently using this particle system and it work fine. Particle's should be destroy after cross boundry's or alpha's smaller then 0. But however sometimes when i use this code like pereatly 4 it fails and particles cant destory.
function init():void
{
particleArray = [];
addEventListener(Event.ENTER_FRAME, onEnterFrameLoop);
createParticle(s3.whell.x,s3.whell.y);
}
function onEnterFrameLoop(event:Event):void
{
updateParticle();
}
/**
* createParticle(target X position, target Y position)
*/
function createParticle(targetX:Number, targetY:Number):void
{
//run for loop based on particleTotal
for (var i:Number = 0; i < particleTotal; i++)
{
var particle_mc:MovieClip = new Particle();
//set position & rotation, alpha
particle_mc.x = targetX
particle_mc.y = targetY
particle_mc.rotation = Math.random() * 360;
particle_mc.alpha = Math.random() * 1.1;
//set particle boundry
particle_mc.boundyLeft = targetX - particleRange;
particle_mc.boundyTop = targetY - particleRange;
particle_mc.boundyRight = targetX + particleRange;
particle_mc.boundyBottom = targetY + particleRange;
//set speed/direction of fragment
particle_mc.speedX = Math.random() * particleMaxSpeed - Math.random() * particleMaxSpeed;
particle_mc.speedY = Math.random() * particleMaxSpeed - Math.random() * particleMaxSpeed;
particle_mc.speedX *= particleMaxSpeed
particle_mc.speedY *= particleMaxSpeed
//set fade out speed
particle_mc.fadeSpeed = Math.random()*particleFadeSpeed;
//just a visual particle counter
particleCurrentAmount++;
// add to array
particleArray.push(particle_mc);
// add to display list
addChild(particle_mc);
}
}
function updateParticle():void
{
for (var i = 0; i < particleArray.length; i++)
{
var tempParticle:MovieClip = particleArray[i];
//update alpha, x, y
tempParticle.alpha -= tempParticle.fadeSpeed;
tempParticle.x += tempParticle.speedX;
tempParticle.y += tempParticle.speedY;
// if fragment is invisible remove it
if (tempParticle.alpha <= 0)
{
destroyParticle(tempParticle);
}
// if fragment is out of bounds, increase fade out speed
else if (tempParticle.x < tempParticle.boundyLeft ||
tempParticle.x > tempParticle.boundyRight ||
tempParticle.y < tempParticle.boundyTop ||
tempParticle.y > tempParticle.boundyBottom)
{
tempParticle.fadeSpeed += 8;
destroyParticle(tempParticle);
}
}
}
function destroyParticle(particle:MovieClip):void
{
for (var i = 0; i < particleArray.length; i++)
{
var tempParticle:MovieClip = particleArray[i];
if (tempParticle == particle)
{
particleCurrentAmount--;
particleArray.splice(i,1);
removeChild(tempParticle);
}
}
}