Odd Function Problem, HELP!

[unrealhacker12]

Hi I have set up a system that spawns barriers for the player to dodge but it appears the functions won't trigger properly from within "if" statements. I've put nots on my code to guide you through what is going on. PLEASE HELP ME!!!

var speed:Number=2;
var barNumber:int=6;
var barLoop:int=0;
var timer:Number=0;
var limit:Number=100;

//Works (Spawns Barrier and moves)
spawn();

//Doesn't work (Spawns barriers but doesn't move)
//Runs every frame
function timedSpawn():void{
    if(timer >= limit){
        spawn();
        //Resets timer
        timer = 0;
    }else{
        timer += 1;
    }
}

//Run once when barrier needs to be created
function spawn(){
    //Random side of the screen
    var screen_side:Number=Math.round(Math.random()*3);
    //Library reference
    var barTemp:MovieClip=new bar;
    //Give MovieClip a number
    this["bar"+barLoop]=barTemp;
    //Add new movieclip to stage
    addChild(this["bar" + barLoop]);
    //Individual sides saved for movement later
    this["side"+barLoop]=screen_side;
    //X/Y and Rotation Depending on the Randomly Generated Screen Side
    //Right
    if (screen_side==0) {
        this["bar"+barLoop].x=820;
        this["bar"+barLoop].y=Math.round(Math.random()*(500-100))+100;
        this["bar"+barLoop].rotation = 90;
    }
    //Left
    if (screen_side==1) {
        this["bar"+barLoop].x=-20;
        this["bar"+barLoop].y=Math.round(Math.random()*(500-100))+100;
        this["bar"+barLoop].rotation = 90;
    }
    //Top
    if (screen_side==2) {
        this["bar"+barLoop].x=Math.round(Math.random()*(700-100))+100;
        this["bar"+barLoop].y=-20;
    }
    //Bottom
    if (screen_side==3) {
        this["bar"+barLoop].x=Math.round(Math.random()*(700-100))+100;;
        this["bar"+barLoop].y=620;
    }
    //Change number for next barrier
    barLoop += 1;
}
//Runs every frame
function moveBarriers():void {
    //Resets the loop to run through all the barriers on stage again
    barLoop=0;
    //Moves each individual barrier on stage in a direction dependant on the side they spawned on
    while (barLoop < barNumber) {
        if(this["side"+barLoop]==0){
            this["bar" + barLoop].x -= speed;
        }
        if(this["side"+barLoop]==1){
            this["bar" + barLoop].x += speed;
        }
        if(this["side"+barLoop]==2){
            this["bar" + barLoop].y += speed;
        }
        if(this["side"+barLoop]==3){
            this["bar" + barLoop].y -= speed;
        }
        barLoop=barLoop+1;
    }
} 

Please ask me any questions if you still can't understand my script. I really need help with this.