Trigger sound doesn't work

Here is my code , i was trying to do it in many ways , I saw a lot of tutorials but nothing work and I dont know why ... Thanks to reply

using UnityEngine; using UnityEngine.UI; using System.Collections; using UnityEngine.SceneManagement;

public class PlayerController : MonoBehaviour {

 public AudioClip sound;
 public AudioSource source;
 public float Volume;


 public float speed;
 public Text countText;
 public Text winText;
 public Vector3 userAcceleration;

 private Rigidbody rb;
 private int count;

 void Start ()
 {
     source = GetComponent<AudioSource>();
     rb = GetComponent<Rigidbody>();
     count = 0;
     SetCountText ();
     winText.text = "";
     Screen.sleepTimeout = SleepTimeout.NeverSleep;
 }

 void FixedUpdate ()
 {
     if(SystemInfo.deviceType == DeviceType.Desktop)
     {
         float moveHorizontal = Input.GetAxis ("Horizontal");
         float moveVertical = Input.GetAxis ("Vertical");

         Vector3 movement = new Vector3 (moveHorizontal, 0.0f, moveVertical);

         rb.AddForce (movement * speed);
     }
     else
     {
         /*float moveH = Input.gyro.userAcceleration.x;
         float moveV = Input.gyro.userAcceleration.y;

         Vector3 movement = new Vector3 (moveH, 0.0f, moveV);

         rb.AddForce(movement * speed * Time.deltaTime);*/

         float moveHorizontal = Input.acceleration.x;
         float moveVertical = Input.acceleration.y;                        
         Vector3 movement = new Vector3 (moveHorizontal, 0.0f, moveVertical);
         rb.AddForce (movement * speed);
     }
 }
     

 void OnTriggerEnter(Collider other) 
 {
     
     if (other.gameObject.CompareTag ("Point"))
     {
         source.PlayOneShot(sound, Volume);
         count = count + 1;
         SetCountText();
         other.gameObject.SetActive (false);
     }
 }

 void SetCountText()
 {
     countText.text = "Count: " + count.ToString ();
     if (count >= 12)
     {

         //winText.text = "Win";

         SceneManager.LoadScene ("DemoScene");
     }
 }

}