Problems with OnMouseDown() event Unity

Question

I am new to Unity and I am doing some tutorials, but one drove me crazy. I have a rotating cube with a box collider on it. All events work except OnMouseDown(). I don't know what is the problem... Here is a snippet of code.

void onMouseDown() {        
    Debug.Log ("On Mouse Down Event!!!!!!!!!");
}

void OnMouseUp() {
    Debug.Log("On Mouse Up Event");
}

void OnMouseOver() {
    Debug.Log("On Mouse Over Event");
}

void OnMouseEnter() {
    Debug.Log("On Mouse Enter Event");
}

void OnMouseDrag() {
    Debug.Log("On Mouse Drag Event");
}

In the console, the message "On Mouse Down Event!!!!!!!!!" doesn't appear not matter my great number of clicks on the cube.

Answer 1

void OnMouseDown() 
{        
    Debug.Log("On Mouse Down Event!!!!!!!!!");
}

Your OnMouseDown method needs to be written with a capital O, not a lower case one. Try that and it should work.