onMouseOver Not working properly

Hi everyone, I have looked through many threads in reference to onMouseOver not working properly but none of the solutions have worked properly for me. My script is on an empty object with a 2D polygon collider attached. Here is my script:

 public class MouseDeadzone : MonoBehaviour {
 
     public bool isTriggered;
 
     // Use this for initialization
     void Start () {
         isTriggered = false;
         Physics.queriesHitTriggers = true;
     }
 
     void update(){
         Debug.Log (isTriggered);
     }
 
     void onMouseOver(){
         isTriggered = true;
     }
     void onMouseExit(){
         isTriggered = false;
     }
 }

The debug shows isTriggered as false even when the mouse is within the collider's zone. I should mention that I am working in 2D and my collider object is the child of a moving and rotating object with a rigidbody and physics. I would rather get this to work than create a raycast, so if anyone has a solution to this it would be greatly appreciated.