# GameObjects won't collide
**URL:** https://discussions.unity.com/t/gameobjects-wont-collide/665188
**Category:** 2D
**Tags:** 2D
**Created:** [May 19, 2017, 3:43pm UTC](https://discussions.unity.com/t/gameobjects-wont-collide/665188 "2017-05-19T15:43:30Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@Layneee](https://discussions.unity.com/u/Layneee)
#### Post date: [May 19, 2017, 3:43pm UTC](https://discussions.unity.com/t/gameobjects-wont-collide/665188/1 "2017-05-19T15:43:30Z")
I’m new to Unity so it’s probably a really easy thing, but i can’t understand why it isn’t working.
I basically have two Gameobjects, one has a Rigidbody 2d and a Box collider 2D, while the other has only a Box Collider 2D.
The two objects collide when i run the game, but Unity won’t recognize it.
This is the code i used to see if the two objects collide, and the console is always empty.
> [@](#):
>
> using UnityEngine;
> using System.Collections;
>
> public class BGLooper : MonoBehaviour {
> // Use this for initialization
> void onTriggerEnter2D(Collider2D collider){
> Debug.Log("Triggered: " + collider.name);
> }
> }
Is there a problem with the code or with something else?
I already tried a few solutions but i can’t get over this problem:
- the two objects are on the same layer and can collide.
- both objects have the IsTrigger option checked.
- the object with the Rigidbody doesn’t have the ‘isKinematic’ option checked.
---
### Author:  [@DanielQuick](https://discussions.unity.com/u/DanielQuick)
#### Post date: [May 19, 2017, 3:52pm UTC](https://discussions.unity.com/t/gameobjects-wont-collide/665188/2 "2017-05-19T15:52:19Z")
You want:
```auto
void OnTriggerEnter2D(Collider2D collider) {
```
not
```auto
void onTriggerEnter2D(Collider2D collider) {
```
Capitalization is important.
---
### Author:  [@Layneee](https://discussions.unity.com/u/Layneee)
#### Post date: [May 19, 2017, 4:01pm UTC](https://discussions.unity.com/t/gameobjects-wont-collide/665188/3 "2017-05-19T16:01:36Z")
> [@DanielQuick](#):
>
> You want:
>
> ```auto
> void OnTriggerEnter2D(Collider2D collider) {
>
> ```
>
> not
>
> ```auto
> void onTriggerEnter2D(Collider2D collider) {
>
> ```
>
> Capitalization is important.
Thank you man!