AudioClip won't play??

When I enter a box collider I want a game object to perform an animation, play a sound and then dissapear, but when I try it doesn't work. Here's my script:

 #pragma strict
 
 private var WillJumpscare : boolean = false;
 var Jumpscare : AnimationClip;
 var JumpscareSound : AudioClip;
 
 function OnTriggerEnter (other : Collider)
     {
         WillJumpscare = true;
     }
 
 function OnTriggerExit (other : Collider)
     {
         WillJumpscare = false;
     }
 
 function Update () {
     if(WillJumpscare == true)
         {
             animation.Play("Jumpscare");
             
             audio.Play("JumpscareSound");
             yield WaitForSeconds (audio.clip.length);
             Destroy (gameObject);
         }
 }

Here is the error:

 Assets/Scripts/Jumpscare.js(22,35): BCE0023: No appropriate version of 'UnityEngine.AudioSource.Play' for the argument list '(String)' was found.

Please help.