GUI Texture hotspot wrong position

Unity Engine
1

I have created a GUI texture and added code for rollover effect and to process click. This is working fine. However, if I change the camera viewport to anything other than the default, the hotspot is appearing at a different place. I changed the Y parameter of the Normalized View Port Rect from 0 to 0.2. The image shifts to the relative center of the modified viewport, but the hotspot stays at the center of default viewport.

Am I doing anything wrong? How do I fix this problem?

I am attaching the code and images to replicate this issue:

var normalTexture : Texture2D;
var rollOverTexture : Texture2D;

var cursor : Texture2D;
var link : Texture2D;
var normal : Texture2D;

function OnMouseEnter(){
	guiTexture.texture = rollOverTexture;
}

function OnMouseExit(){
	guiTexture.texture = normalTexture;
	
	Screen.showCursor = true;
	cursor = normal;
}

function OnMouseOver () {
	Screen.showCursor = false;
	cursor = link;
}

function OnGUI () {
	GUI.Label(Rect(Input.mousePosition.x-12, Screen.height - Input.mousePosition.y-10, 100, 100), cursor);
}

function OnMouseUp() {
	print("Clicked!");
}

I need to change the viewport because, I am going to use multiple camera.

512245--18187--$CameraReset_RollOver.png
512245--18188--$cursor-hand.png
512245--18189--$CameraReset_Normal.png

2

i think you should probably use GUIStyle or GUISkin for giving some effects of GUI such as Active,hover,etc. it seems to be easy.

and there is an example for rollover

3

Thanks cemC. The example was helpful. I am switching over to UnityGUI, but still the problem I mentioned is unusual.