My CheckoutDoneOrderIsComplete notification is not called after returning from gateway provider

Hello.

I have this notification for at CartV2

   [Subscribe(Dynamicweb.Ecom7.Cart.Notifications.CheckoutDoneOrderIsComplete)]
    public class EcomOrderStateChangedObserver : Dynamicweb.Extensibility.NotificationSubscriber
    {
        public override void OnNotify(string notification, object[] args)
        {
            try
            {
                System.IO.File.WriteAllText(@"E:\path\to\file.txt", "order completed");
            }
            catch(Exception e) {
                System.IO.File.WriteAllText(@"E:\path\to\file.txt", "order completed" + e.Message + e.StackTrace);
            }
        }
    }

As I understand it, this is called when the customer returns from the gateway provider. But this is not called. I do not get anything written in my folder. Why is this? As I understand, the notification is called right after the user returns, and before any emails is sent.

Keep in mind that I have written a custom checkout handler to a 3 party payment service. Maybe it is this that is causing the trouble? My redirect method looks like this:

        public override string Redirect(Dynamicweb.eCommerce.Orders.Order order)
        {
            string result = null;

            string orderStatus = HttpContext.Current.Request.QueryString["order"];
            if (orderStatus == "complete")
            {
                order.TransactionStatus = "completed";
                base.SetOrderComplete(order);
                base.CheckoutDone(order);
                order.Save();
                LogEvent(order, "complete");

                base.RedirectToCart(order);
            }
            else
            {
                LogError(order, "transaktionen fejlede");
                order.TransactionStatus = "failed";
                order.Save();
                base.CheckoutDone(order);

                result = PrintErrorTemplate(order);
            }

            return result;
        }

I do not call any, or init, any observer collections or so, as I think that it is DWs job. But maybe I am forgetting something? I have tried the same with OrderIsPassedToCheckoutHandler and the same code, and this is not called either.

[Subscribe(Dynamicweb.Ecom7.Cart.Notifications.CheckoutDoneOrderIsComplete)] public class EcomOrderStateChangedObserver : Dynamicweb.Extensibility.NotificationSubscriber { public override void OnNotify(string notification, Dynamicweb.Extensibility.NotificationArgs args) { var myArgs = (Dynamicweb.Ecom7.Cart.Notifications.CheckoutDoneOrderIsCompleteArgs) args; var order = myArgs.Order; } }

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My CheckoutDoneOrderIsComplete notification is not called after returning from gateway provider

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