Kentico SecurityEvents.Authenticate.Execute is not getting called

I have App_Code folder with CMSModuleLoader for authentication in my Kentico CMS 8.0.21 I also have an HTTP module to handle Formsauthentication cookie. The CMSModule Loader event never gets called. What is the best way to get a call to CMSModuleLoader events.

[CustomNewRelicSubstitutionLoader]

[CustomSecurityEventsAttribute]

[CustomErrorEventsAttribute]

[CustomRequestEventsAttribute]

[CustomSessionEventsAttribute]

public partial class CMSModuleLoader

{

private class CustomSecurityEventsAttribute : CMSLoaderAttribute

{

   public override void Init()

    {

        SecurityEvents.Authenticate.Execute += new EventHandler<AuthenticationEventArgs>

        (Authenticate_Execute);

    }

    /// <summary>

    /// called on every kentico authenticate attempt

    /// </summary>

    /// <param name="sender"></param>

    /// <param name="e"></param>

    private void Authenticate_Execute(object sender, AuthenticationEventArgs args)

    {

        if (args.User != null) //the authenticate was successful

        {

            try