Codeless IAP not working

I'm aving a small issue that i cant resolve.

I first add codeless IAP in the first scene of my game and it was working 100% on my android Phone.

I decided to move the store in an other scene and everything stop working... cant find what i'm doing wrong.

Some one have a hint?

I've tryed to create a Initialisation script that i added to a gameobject in the desired scene (not the first scene of the game)

___________________________________________________________

using UnityEngine;
using UnityEngine.Purchasing;

public class MyIAPManager : MonoBehaviour, IStoreListener
{

private IStoreController controller;
private IExtensionProvider extensions;

void start()
{
var builder = ConfigurationBuilder.Instance(StandardPurchasingModule.Instance());
UnityPurchasing.Initialize(this, builder);
}

/// <summary>
/// Called when Unity IAP is ready to make purchases.
/// </summary>
public void OnInitialized(IStoreController controller, IExtensionProvider extensions)
{
this.controller = controller;
this.extensions = extensions;
}

/// <summary>
/// Called when Unity IAP encounters an unrecoverable initialization error.
///
/// Note that this will not be called if Internet is unavailable; Unity IAP
/// will attempt initialization until it becomes available.
/// </summary>
public void OnInitializeFailed(InitializationFailureReason error)
{
}

/// <summary>
/// Called when a purchase completes.
///
/// May be called at any time after OnInitialized().
/// </summary>
public PurchaseProcessingResult ProcessPurchase(PurchaseEventArgs e)
{
return PurchaseProcessingResult.Complete;
}

/// <summary>
/// Called when a purchase fails.
/// </summary>
public void OnPurchaseFailed(Product i, PurchaseFailureReason p)
{
}
}

 

Ok I clean every things.

When you mentionned "IAP Listener and and make it globally available". what should i do?
I added it to the first scene.... i tryed to read to do a singleton without success...

i'm a bit lost... and mixed up with all the documentation.

 

I also try DontDestroyOnLoad(this.gameObject) in the MyApiManager script