User Registration: Website now cannot be accessed freely

I’m setting up a system that has three components: (1) a user fills out Gravity form to become a paid member [membership is for a 2-year period and not automatically renewed; the form has both a price field for membership categories and a donation field]; (2) once the user submits the form he\she is sent to PayPal for payment there; (3) once payment has been done the user is registered using the Gravity User Registration system.

I’m first testing step #1 and #3 to make sure they work before setting up the PayPal component.

However, I’m running into this problem: Once a “dummy” user has submitted the form and has been registered (and received email confirmation) my website can only be accessed if you login with a username and password.

My aim is to have a website open to any visitor but that has content accessible only by paid members [using the “Members” plugin by Justin Tadlock].

So, what has happened that now my testing website cannot be freely viewed anymore unless you login first?

Thanks in advance for your help.