Particle Not Instantiating

Hey, I was wondering if someone could help me on this script I've been working on, the problem i have encountered is that the particle that I have attached wont instantiate. If someone could help me, then that would be much appreciated!

 //Variables Start___________________________________
 
 
 //The explosion effect is attached to this
 //in the inspector
 
 public GameObject mudParticle;
 
 
 //A quick reference.
 
 private Transform myTransform;
 
 
 //The projectiles flight speed.
 
 private float projectileSpeed = 200;
 
 
 //Prevent the projectile from causing
 //further harm once it has hit something.
 
 private bool expended = false;
 
 
 //A ray projected in front of the projectile
 //to see if it will hit a recognisable collider.
 
 private RaycastHit hit;
 
 
 //The range of that ray.
 
 private float range = 1.5f;
 
 
 //The life span of the projectile.
 
 private float expireTime = 10;
 
 
 //Variables End_____________________________________
 
 // Use this for initialization
 void Start () 
 {
    myTransform = transform;
 
    //As soon as the projectile is created start a countdown
    //to destroy it.
 
    StartCoroutine(DestroyMyselfAfterSomeTime());
 }
 
 // Update is called once per frame
 void Update () 
 {
    //Translate the projectile in the up direction (the pointed
    //end of the projectile).
 
    myTransform.Translate(Vector3.left * projectileSpeed * Time.deltaTime);
 
 
    //If the ray hits something then execute this code.
 
    if(Physics.Raycast(myTransform.position,myTransform.forward, out hit, range) &&
       expended == false)
    {
      //If the collider has the tag of Floor then..
 
      if(hit.transform.tag == "floorMud")
      {
       expended = true;
 
 
       //Instantiate an explosion effect.
 
       Instantiate(mudParticle, hit.point, Quaternion.identity);
 
 
       //Make the projectile become invisible.
 
       myTransform.renderer.enabled = false;
 
 
       //Turn off the light. The halo will also disappear.
 
       myTransform.light.enabled = false;
      }
    }
 }
 
 
 IEnumerator DestroyMyselfAfterSomeTime()
 {
    //Wait for the timer to count up to the expireTime
    //and then destroy the projectile.
 
    yield return new WaitForSeconds(expireTime);
 
    Destroy(myTransform.gameObject);
 }

}