Members Pro Payment Conformation Page with Authorize.net

I have a question about what happens after the user hits the payment process button. We are not getting a response the the payment has been processed. Instead just a blank page with "/paymentreturn/authorizenetaim" url.

We are using version 3.0.1 and the payments are going through but just not showing a response on the website for the user.

I checked Authorize.net's settings page and the "Direct Response Delimiter" option was off, so I now turned that on. The "Default Field Separator" is set to "," (comma) and the "Field Encapsulation Character" is blank. Is this all I need to do?