Trigger collision 2d

Unity Engine
1

i have some troube obout trigger at BoxCollider2d, i create simple jump use trigger for check groud this my code

using UnityEngine;
using System.Collections;

public class kontroler : MonoBehaviour {
    public float mspeed;
    public float jump;
    public Rigidbody2D rb;

    private bool cek ;
    // Use this for initialization
    void Start () {
        rb = GetComponent<Rigidbody2D>();
    }
   
    // Update is called once per frame
    void Update () {
        float q = Input.GetAxis ("Horizontal") * mspeed;
        transform.Translate (new Vector3 (q, 0));

        float e = Input.GetAxis ("Vertical") * jump;
            // i use false couse default value bool false i mean
            if (cek == false) {
            rb.AddForce (new Vector2 (0, e));
        }
   
    }
    void OnTriggerEnter2D(Collider2D col){
           //when touch ground value cek = false
           if (gameObject.tag == "ground") {
            cek = false;
        }
    }
    void OnTriggerExit2D(Collider2D cd){
           // when jump , just 1 jump
            if(gameObject.tag == "ground"){
            cek = true;
        }

    }
}

im new in unity , :*

2

what is the trouble? Your code seems like it should work correctly. ARe you able to jump all the time. Or do you sometimes double jump right at the beginning? is it not jumping at all?

3

is it not jumping at all , i dont know where the trouble, im use unity 5.2.0f3