Main Menu Problem

I used this video: http://www.youtube.com/watch?v=Z8YGKQvEz1Y

This script:

var levelToLoad : String; var soundhover : AudioClip; var beep : AudioClip; var QuitButton : boolean = false; function OnMouseEnter(){ audio.PlayOneShot(soundhover); } function OnMouseUp(){ audio.PlayOneShot(beep); yield new WaitForSeconds(0.35); if(QuitButton){ Application.Quit(); } else{ Application.LoadLevel(levelToLoad); } } @script RequireComponent(AudioSource)

and I used the map name Map_Select which is the right name. IT WONT WORK WHEN I CLICK THOUGH.

Please Help