Auto Return suddenly is not working

I’ve been using s2member in my wordpres members website for about a year now, and i never had any issues. Suddenly yesterday my dedicated server was restarted for some memory outage, everything went back to normal, but now my customers when they complete their payment on paypal they are not redirected back to register to that can create an account that will allow them to access the members page.
By the way i was using the free version all along and i just bough the pro version and i update it.

This is very urgent I really appreciate your prompt respond, and yes the Logging Routines are enabled.

Can you post the logs then minus sensitive info.

What happens after payment are they redirected anywhere?

Here is the log :
PHP v5.2.14 :: WordPress® v3.3.2 :: s2Member® v120517 :: s2Member® Pro v120517
Memory 34.15 MB :: Real Memory 34.50 MB :: Peak Memory 34.33 MB :: Real Peak Memory 34.50 MB
unlocker.ws/?s2member_paypal_return=1&tx=xxx&st=Completed&amt=24.99&cc=USD&cm=unlocker%2ews&item_number=1
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_7_4) AppleWebKit/534.56.5 (KHTML, like Gecko) Version/5.1.6 Safari/534.56.5
array (
‘transaction_subject’ => ‘unlocker.ws’,
‘payment_date’ => ’08:35:52 May 23, 2012 PDT’,
‘txn_type’ => ‘web_accept’,
‘last_name’ => ‘mistretta’,
‘residence_country’ => ‘US’,
‘item_name’ => ‘Instant Lifetime Access’,
‘payment_gross’ => ‘24.99’,
‘mc_currency’ => ‘USD’,
‘business’ => ‘xx’,
‘payment_type’ => ‘instant’,
‘protection_eligibility’ => ‘Ineligible’,
‘payer_status’ => ‘verified’,
‘tax’ => ‘0.00’,
‘payer_email’ => ‘xx’,
‘txn_id’ => ‘xx’,
‘quantity’ => ‘1’,
‘receiver_email’ => ‘xx’,
‘first_name’ => ‘xx’,
‘payer_id’ => ‘xx’,
‘receiver_id’ => ‘xxx’,
‘item_number’ => ‘1’,
‘payer_business_name’ => ‘xxxx’,
‘handling_amount’ => ‘0.00’,
‘payment_status’ => ‘Completed’,
‘payment_fee’ => ‘1.02’,
‘mc_fee’ => ‘1.02’,
‘shipping’ => ‘0.00’,
‘mc_gross’ => ‘24.99’,
‘custom’ => ‘unlocker.ws’,
‘charset’ => ‘windows-1252’,
‘s2member_log’ =>
array (
0 => ‘Return-Data received on: Wed May 23, 2012 3:36:02 pm UTC’,
1 => ‘s2Member POST vars verified through a POST back to PayPal®.’,
2 => ‘s2Member originating domain ( `$_SERVER[“HTTP_HOST”]` ) validated.’,
3 => ‘Page Expired. Duplicate Return-Data.’,
4 => ‘s2Member `txn_type` identified as ( `web_accept|subscr_signup|subscr_payment` ).’,
5 => ‘Page Expired. Redirecting Customer to the Home Page.’,
),
‘subscr_gateway’ => ‘paypal’,
‘subscr_id’ => ‘xxxx’,
)

And I’m sure this customer does not have an account with us so we know for a fact its not duplicate.

The message that you get after you are redirected from paypal is below:

How many times has this occurred according to your logs?
Is it happening to all transactions?
I think this can happen when a customer press’s the back button on their browser but this would not be the problem if its happening to multiple customers

Have you recently installed any new plugins that might be caching object data in WordPress?

All great points, Philly.

Jaime, if you do a test transaction for 1 cent, do you have the same problem? Make sure to not be logged in when you load the page with the button.

I don’t know what happen but now its working fine, thank you for your time.

I’m glad! Thanks for the update. :)