I have installed s2Member Pro and I have a PayPal Website Payments Pro account. I'm restricting specific post/pages, and I've created the PayPal Pro Form. It appears to work, except when I conduct a test transaction using PayPal as the payment option, I'm redirected to PayPal.com, just like before when I was using the free version. This is frustrating and confusing.
I've provided Sandbox API credentials, which appear to be working correctly. Any suggestions would be very much appreciated!