guitext is not changing color

i attached this script to guitext but… ok when I am pressing the guitext it isn’t changing the color, no erors in console, i really dont know.

function Start(){
	guiText.material.color = Color.white;
}
function OnMouseOver(){
	guiText.material.color = new Color(0.5, 0.5, 0.5, 1);
}
function OnMouseExit(){
	guiText.material.color = Color.white;
}
function OnMouseDown(){
guiText.material.color = Color.green;
}

I’m not sure why you’re getting angry that people haven’t replied within 20 minutes.

Anyway, a quick google search gives me this duplicate question: