NGUI UI OVERLAPPING PROBLEM

I have different UIRoots setup across different scenes in my project in order to draw different UIs for different screens and a singleton-like gamemanager object managing all the screens to help transition from one screen to the next. When I go from one screen to the next screen I have the gamemanager object GameObject.FindObjectWithTag("UIRoot") and Destroy() the current UIRoot gameobject which has a tag on it of "UIRoot" so that it does not appear on the next screen(this screen has a seperate UIRoot Object dedicated to drawing the UI for that Screen).

Everything seems to be working great in the Unity Editor however on stand-alone windows builds and web player builds the UI for one screen remains even after transitioning to the next screen. The two UIs are therefore overlapping each other in subsquent screens.

I was wondering if anyone had any idea as to where the problem might be? Should I use a different design pattern and keep one UIRoot object alive across all scenes as oppossed to having different ones for each screen?

Thanks for any help!