in the project roll the ball while COLLECTING THE PICK UP OBJECTS the ball goes through and dosen't pick up the object

i have entered the code,done the trigger part using the prefab ,checked if all are in prefab and checked if the code is applied ,i cant find any mistakes in my code please help me find any mistake and solve this here is my code:

 using UnityEngine;
 using System.Collections;
 
 public class playercontrol : MonoBehaviour {
     
     public float speed;
     
     private Rigidbody rb;
     
     void Start () 
     {
         rb = GetComponent<Rigidbody>();
     }
     
     void FixedUpdate ()
     {
         float moveHorizontal = Input.GetAxis ("Horizontal");
         float moveVertical = Input.GetAxis ("Vertical");
         
         Vector3 movement = new Vector3 (moveHorizontal, 0.0f, moveVertical);
         
         rb.AddForce (movement * speed);
     }
     
     
     void onTriggerEnter(Collider other) 
     {
         if (other.gameObject.CompareTag("Pick Up")) 
         {
             other.gameObject.SetActive (false);
         }
     }
 }