GUI Box not showing!

HI.I am using this code but the bui box is just now showing up.I have the gui layer on my camera.Thanks for help!

function OnGUI()
	GUI.Box ( Rect ( Screen.width/2 , Screen.height/2 , 100 , 100 ) , " Start" );

Your code looks right. My guess is that you haven’t attached the component to a scene object, that the component is disabled, or that you are looking at it either in the scene window or in the editor. OnGUI stuff only happens in the Game window at runtime.