I set up a 1 day free trial and then 1 day recurring subscription after free trial expires.
my logs show:
0 => 'Unable to verify $_POST vars. This is most likely related to an invalid configuration of s2Member, or a problem with server compatibility.',
1 => 'If you\'re absolutely SURE that your configuration is valid, you may want to run some tests on your server, just to be sure $_POST variables are populated, and that your server is able to connect/communicate with your Payment Gateway over an HTTPS connection.',
2 => 's2Member uses the `WP_Http` class for remote connections; which will try to use `cURL` first, and then fall back on the `FOPEN` method when `cURL` is not available. On a Windows® server, you may have to disable your `cURL` extension; and instead, set `allow_url_fopen = yes` in your php.ini file. The `cURL` extension (usually) does NOT support SSL connections on a Windows® server.',
3 => 'Please see this thread: `http://www.primothemes.com/forums/viewtopic.php?f=36&t=2636` for details regarding the ideal server configuration for s2Member.',
4 => 'array (
0 => 'IPN received on: Tue Dec 6, 2011 10:29:34 pm UTC',
1 => 's2Member POST vars verified through a POST back to PayPal®.',
2 => 's2Member originating domain ( `$_SERVER["HTTP_HOST"]` ) validated.',
3 => 's2Member `txn_type` identified as ( `web_accept|subscr_signup` ).',
4 => 's2Member `txn_type` identified as ( `web_accept|subscr_signup` ) w/ update vars.',
5 => 'Unable to modify Subscription. The existing User ID is associated with an Administrator. Stopping here. Otherwise, an Administrator could lose access.',
0 => 'No Return-Data. Customer must wait for Email Confirmation.',
1 => 'Redirecting Customer to the Home Page. Customer must wait for Email Confirmation.',
2 => 'Note. This can sometimes happen when/if you are offering a free Trial Period. There are times when a Payment Gateway will NOT supply s2Member with any data immediately after checkout. When/if this happens, s2Member must process the transaction via IPN only ( i.e. behind-the-scene ), and the Customer must wait for Email Confirmation in these cases.',
3 => 'array (Statistics: Posted by trc4949 — December 6th, 2011, 5:35 pm
]]>