You can create a new PayPal Subscription for automatic payments when your invoice is created (and that it is not overdue) by following below steps:
1) Login to members portal https://members.softsyshosting.com/clientarea.php
2) Click on Billing -> My Invoices
2) Click on View Invoice beside unpaid invoice.
3) Select PayPal payment gateway.
4) Click on PayPal Subscribe button and proceed to create PayPal subscription.
Note: Subscription creation is only available when you are not overdue with invoice payment