Delete this.onEnterFrame

i am using the following AS to scale a movieclip with ease


onClipEvent(load){ 
targe_width = _width;

}
onClipEvent(enterFrame){ 
	targe_width = 360;
	_width = _width += (targe_width - _width)/3.6;

}

should i be using a delete this.OnEnterFrame when the clip reaches the desired width? the problem is that ive noticed a lag in my tweens and i wonder if this is whats causing it.

any ideas?