Function(){ problem

1

HI can anyone tell me what I did wrong with my function please

Frame

[AS]function zzero(){
if(this.hitTest(_parent.zeroT1)){
_root.ZeroScore = 100;
}else if(this.hitTest(_parent.zeroT2)){
_root.ZeroScore = 100;
}else if(this.hitTest(_parent.zeroT3)){
_root.ZeroScore = 100;
}else if(this.hitTest(_parent.zeroT4)){
_root.ZeroScore = 100;
}else{
_root.ZeroScore = 0;
}
}
[/AS]
Movie Clip

[AS]on(press){
startDrag(this);
}
on(release){
stopDrag();
_root.zzero();
trace(_root.ZeroScore);
}
[/AS]

THANKYOU:)