Thanks for the update. Glad you solved the caching problem. :)
Now I have disabled W3 Total cache and using WP super cache. So far the sign up forms are working smoothly with WP super cache. So I would recommend this plugin to those who want use cache along with S2member.
QuickCache also works very well. http://wordpress.org/extend/plugins/quick-cache/
I am still having one problem though. After I cancel the paypal payments from a test account that Im using, the membership account does not get terminated right away. Is this normal? Is there a delay between paypal cancellations and membership account termination?
Yes, there may. The demotion will happen after the time paid for is used completely. If the user is paying monthly and mid-month he cancels the subscription, he still has the other half month paid for, and will have access until that runs out. [hilite path]Dashboard -› s2Member® -› PayPal® Options -› Automatic EOT Behavior -> Hairy Details[/hilite]
*Some Hairy Details* There might be times whenever you notice that a Member’s Subscription has been cancelled through PayPal®… but, s2Member continues allowing the User access to your site as a paid Member. Please don’t be confused by this… in 99.9% of these cases, the reason for this is legitimate. s2Member will only remove the User’s Membership privileges when an EOT ( End Of Term ) is processed, a refund occurs, a chargeback occurs, or when a cancellation occurs – which would later result in a delayed Auto-EOT by s2Member.
s2Member will not process an EOT until the User has completely used up the time they paid for. In other words, if a User signs up for a monthly Subscription on Jan 1st, and then cancels their Subscription on Jan 15th; technically, they should still be allowed to access the site for another 15 days, and then on Feb 1st, the time they paid for has completely elapsed. At that time, s2Member will remove their Membership privileges; by either demoting them to a Free Subscriber, or deleting their account from the system ( based on your configuration ). s2Member also calculates one extra day ( 24 hours ) into its equation, just to make sure access is not removed sooner than a Customer might expect.
I hope that helps. :)