AS3 Help Needed

[7iven8Nine]

Hey so I just duplicated a object on the stage and gave it a new name but the duplicated object won't move. Any help would be appreciated. Here's the code:

Duplication Code:
if(cheatguard==2){
var dupbig1 = new PeopleBig();
dupbig1.x=300;
dupbig1.y=300;
addChild(dupbig1);
dupbig1.width=75.15;
dupbig1.height=110.35;
}

Movement code:
if(dupbig1 != null){
dupbig1.x += dup1move;
if(dupbig1.hitTestObject(neww)){
neww.x=-215.45;
neww.y=411.2;
updateScoreyellow();
cheatguard=cheatguard+1;
ssd=0;
}
if(dupbig1.hitTestObject(Wallleft)){
dup1move = 5;
}
if(dupbig1.hitTestObject(Wallright)){
dup1move = -5;
}
Edit: dup1move is a variable that equals 5
I get no errors from this code either.
Edit2:Fixed