When you come to the site as a non-member it only requires

When you come to the site as a non-member it only requires you to register with an email and password and then gives you full access never asking for payment. However if you log in as a memeber or admin it asks you to pay via a pay pal button. What have I done wrong because I need this site to sell subscriptions not give them away.
http://www.ipnshosting.com/cowgirl