OnTriggerEnter2D Collision not working

I have a mouse running around and avoiding lasers that turn on and off, but the collision between the mouse and when the laser is on is not working. The mouse has a 2D circle collider and ridgidbody2D. The laser has a 2D box collider and "is Trigger" is selected. The first piece of code is for everything relating to the laser. The second part is related to the mouse's movement and interactions. The print statements for the mouse code never show up.

using UnityEngine; using System.Collections;

public class LaserScript : MonoBehaviour {

 //1
 public Sprite laserOnSprite;
 public Sprite laserOffSprite;

 //2
 public float interval = 0.5f;
 public float rotationSpeed = 0.0f;

 //3
 private bool isLaserOn = true;
 private float timeUntilNextToggle;


 // Use this for initialization
 void Start () 
 {
     timeUntilNextToggle = interval;
 }
 
 // Update is called once per frame
 void Update () {
 
 }

 void FixedUpdate () {
     //1
     timeUntilNextToggle -= Time.fixedDeltaTime;
     
     //2
     if (timeUntilNextToggle <= 0) 
     {
         
         //3
         isLaserOn = !isLaserOn;
         
         //4
         GetComponent<Collider2D>().enabled = isLaserOn;
         
         //5
         SpriteRenderer spriteRenderer = ((SpriteRenderer)this.GetComponent<Renderer>());
         if (isLaserOn){
             spriteRenderer.sprite = laserOnSprite;
         }
         else{
             spriteRenderer.sprite = laserOffSprite;
         }
         //6
         timeUntilNextToggle = interval;
     }
     
     //7
     transform.RotateAround(transform.position, Vector3.forward, rotationSpeed * Time. fixedDeltaTime);
 }

}

public class MouseController : MonoBehaviour {

 public float jetpackForce = 75.0f;
 public float forwardMovementSpeed = 3.0f;
 public Transform groundCheckTransform;
 private bool grounded;
 public LayerMask groundCheckLayerMask;
 Animator animator;
 public ParticleSystem jetpack;
 private bool dead = false;

 private Rigidbody2D mouse;

 void FixedUpdate () 
 {
     bool jetpackActive = Input.GetButton("Fire1");

     jetpackActive = jetpackActive && !dead;

     if (jetpackActive)
     {
         mouse.AddForce(new Vector2(0, jetpackForce));
     }
     if (!dead) 
     {
         Vector2 newVelocity = mouse.velocity;
         newVelocity.x = forwardMovementSpeed;
         mouse.velocity = newVelocity;
     }
     UpdateGroundedState();
     AdjustJetpack(jetpackActive);
 }
 // Use this for initialization
 void Start () 
 {
     mouse = gameObject.GetComponent<Rigidbody2D> ();
     animator = GetComponent<Animator> ();
 }
 
 // Update is called once per frame
 void Update () {
 
 }


 void UpdateGroundedState()
 {
     //1
     grounded = Physics2D.OverlapCircle(groundCheckTransform.position, 0.1f, groundCheckLayerMask);
     
     //2
     animator.SetBool("Grounded", grounded);
 }

 void AdjustJetpack (bool jetpackActive)
 {
     jetpack.enableEmission = !grounded;
     jetpack.emissionRate = jetpackActive ? 300.0f : 75.0f;
 }

 void onTriggerEnter2D(Collider2D collider)
 {
     if (collider.name == "laser") {
         HitByLaser ();
         print ("hit");
     }
 }

 void HitByLaser()
 {
     dead = true;
     print ("dead");
 }

}