Activities of "bill"

I have created some application services, which extends Abp ApplicationService. some methods are marked with AbpAuthorize attribute. also I have codes to enable audit log for both authorized & anonymous request.

Configuration.Auditing.IsEnabledForAnonymousUsers = true;
Configuration.Auditing.Selectors.Add(
        new NamedTypeSelector(
                    "Abp.ApplicationServices",
                    type => typeof(IApplicationService).IsAssignableFrom(type)
        )
);

I found the audit log has not been recorded in database if the validation or authorization failed.

any comment about it?