PayPal IPN problem

[nsix]

Hi

I've recently downloaded and installed the latest version of ZenCart on my server. I have followed the instructions and got it working well, except as far as IPN is concerned.

I have read through the numerous other posts here about IPN and thoroughly digested the FAQs and Wiki pages concerning IPN. However, I still have a problem.

I am using PayPal sandbox and have set up two accounts, one seller, one purchaser, and have matched up the addresses and http's in both PayPal and Zen. I have switched IPN on and correctly matched the PDT codes.

When I make a purchase on my Zen, I am referred to the PayPal Sandbox log-in page and once logged in, with the purchaser account, I am able to confirm the payment, from the PayPal balance, and am referred back to my Zen. However, an updated order number does not appear nor does the transaction appear anywhere in the Zen AdminCP.

The payment is deducted from the purchaser PayPal account and added to the seller PayPal account.

Free "purchases" are processed correctly, so it would seem it is an IPN problem. I have made sure ports are open, re-installed the module, checked and double checked all settings according to the Wiki article - all to no avail.

With PDT turned off the logs state that all goes well until after Breakpoint 1 when an IPN warning states that the transaction was not marked as verified:

IPN WARNING :: Transaction was not marked as VERIFIED. Keep this report for
potential use in fraud investigations.
IPN Info =
This object may be found here

then

IPN FATAL ERROR :: Transaction did not validate

With PDT turned on it doesn't get to the Breakpoint:

PDT Returned Data Array
(
)

then

IPN WARNING :: PDT Transaction was not marked as SUCCESS. Keep this report
for potential use in fraud investigations.
IPN Info =
This object may be found here

then

PDT WARNING :: Order not marked as "Completed". Check for Pending reasons
or wait for IPN to complete.
[payment_status] =>
[pending_reason] =>

I've triple checked that the PDT is correct in Zen, and I've switched every option referred to in previous topics around, but still can't get it to work.

I hope it's something simple I've missed. Any help would be appreciated.

Many thanks.

[DrByte]

If your only logs are PDT logs then something must be blocking incoming IPN traffic.
What happens if you turn off PDT altogether? (disable in your pp account, and blank out the pdt code in zen cart module)

And ... what happens when you test a live transaction instead of the sandbox?

[PeaceWorks]

I've had the same problem. I believe it is a port issue that can be fixed by changing /includes/modules/payment/paypal/paypal_functions.php : line 399

//$scheme = 'http://';
$scheme = 'https://'; 

It could be related to some changes by PayPal to the sandbox area.

Source Info:
http://paypaldeveloper.com/pdn/board...cending&page=1
http://paypal.lithium.com/pdn/board/...essage.id=9593


Matt