Recurring payment

Wanted web developer for CMS Joomla and component Akeeba Subscription. Our need is to handle recurring payments with component Akeeba subscription and Paypal. The idea is to manage with component Akeeba Subscription a subscription structured in this way: - First payment for trial period of 2-week . - Second payment for a period of 365 days to the end of his trial period. - After expiry of the service will automatically renew for one year. Our problem is the Sandbox Paypal. We can not simulate and thus confirm the correct operation of the component. This is the help you need: - Being able to set the sandbox Paypal and component Akeeba Subscription to verify the correct functioning of the component. The only problem we have is that the component can not handle the PayPal ipn in sand box session and, consequently, failure to update the state of the client in our system. - If it does not work properly,the next step is make appropriate changes to the component about the phase of payment , automatic database updates whenever there is a subscription by a client .