Unity Canvas hover image does not trigger event

So i have the following setup:

This produces the following UI:

Now on each of the "HudCircle"(Bottom/Right/Left/Top), I have the following components:

As you can see I have a script that has the following code:

    public class HUDAction : MonoBehaviour,  IPointerEnterHandler, IPointerExitHandler
{
    public Color StartColor;
    public Color SelectedColor;
    public Image Image;

    private void Awake()
    {
        Image = GetComponent<Image>();
        StartColor = Image.color;
    }

    public void OnPointerEnter(PointerEventData eventData)
    {
        Image.color = SelectedColor;
        Debug.Log("Over");
    }

    public void OnPointerExit(PointerEventData eventData)
    {
        Image.color = StartColor;
        Debug.Log("Not over");
    }
}

Sadly when playing this scene nothing happens when I hover either of the circles.

Can anyone tell me what I've done wrong?