[Membership 2 Pro] Membership sends mail when the Offer Free Trial its active, but not when I acti

Hi! We configure a custom mail when an user makes a subscription. We configure the payment method and everything works fine, but when the subscription is done, the custom mail it´s not send to the user; neither the admin. If we configure the subscription as free or activate the Offer Free Trial, mail works without problem. We dont understand what we are doing wrong. We have tried all the options. Can you help us, please?