iTween JavaScript orienttopath bug?

I put iTween.cs in Plugins, then I created a simple cube, attached the following JavaScript to it:

function Update () { iTween.MoveTo(gameObject, {"x":903, "z":-258, "orienttopath":false, "speed":60, "easetype":"linear"} ); }

It moved fine. But when I turn orienttopath to true, it did orientated the direction but then it did not move. I just stayed on the spot. Using C# works.

I need to use JavaScript as the rest of my game is in JavaScript. I can use C# to move my game zombie character but I do not know how to make my JavaScript global variable "gameOver" to true if the zombie reached the destination.