How could I follow a moving object with iTween?

this is my code:
iTween.MoveTo(this.gameObject,target.position,5f));

my object moves only the target stoped.
how could i let the object moving when the target is moving? thx!

public var target : Transform;

function FixedUpdate ()
{	
	var pos : Vector3  = target.position;
	pos.z=target.position.z-19;
	pos.y=target.position.y+7;
	iTween.MoveUpdate(gameObject,pos,1.2);
}

That is using iTween.MoveUpdate, which keeps checking the position of the target.

The pos.z and pos.y are just offsets.

Your question was a bit vague. But thought I’de try to help!

P.S. I highly suggest the iTween visualeditor :
http://dkoontz.wordpress.com/itween-visual-editor/

Makes iTween even better (if thats possible!)