Inactivity timer mistake?

1

hey,
I have a problem with an inactivity timer. I want a warning message to appear if a user is inactive with mouse movement for a period of time. The function itself does work, i tested it with the “trace” tag…

I want a Movieclip: “inactivitywarning” wich has the alpha of 0 to fade to 100% and a message will appear…

it does not work! where’s my mistake (the path to the MC is correct)?:

var inactiveTime = 5000;// 5 seconds 
function tooLong(){ 
    inactivitywarning.alphaTo(100, 0.5, "easeOutSine",0); 
} 
var intrvl = setInterval(tooLong, inactiveTime); 
onMouseMove = function(){ 
    clearInterval(intrvl); 
    intrvl = setInterval(tooLong, inactiveTime); 
}  
Key.addListener(this);