General Membership plugin questions

I have some questions about the membership plugin.

I am using paypal as a gateway. I have two subscription options: a lifetime subscription and a monthly subscription.

Currently, when someone signs up and pays, nothing happens. The user returns to the site from paypal and still cant login with the user name. It says "sorry, this account is not active"

On the admin side, the user is added to the database of users, but no subscription information is associated with the user name. Did I miss something in the set up? My assumption is once the user signs and up and pays through paypal, they will have immediate access to the site.