why the membership plugin doens't work to my blog?

i try to configurate all of need i follow the instruction but when i try to visit the site as a viewer i can access all pages and i try to make No Access page & subscribe now but no access is not working .... its in there in page and why i can't edit the price i want to put it only $4.99 there have no cents in paypal they can pay any you want... why i can't edit that is there anything i can do to .. any one here