CiviCRM Community Forums (archive)

This is probably user error, but I can't figure out what I'm doing wrong.

My setup

• CiviCRM 2.2.8
• Drupal 6.13 multisite installation
• PayPal Standard payment processor in sandbox mode

My problem
For a subdomain (client1.example.com) running CiviCRM, I've setup an event and attempted to register for it (both using Test Drive and copying in the PayPal sandbox info in the Live settings for the payment processor). After the event registration process successfully completes and I'm returned to the subdomain website,  the registrant never moves out of "Pending" status, which sounds like the Instant Payment Notification process is broken. But I've setup IPN for my PayPal sandbox seller according to the instructions. And judging from my Apache log, PayPal is trying to send notification since I'm seeing a line like:216.113.191.33 .... POST /sites/all/modules/civicrm/extern/ipn.php?... So I'm not sure why the registration process isn't completing.

My Totally Random Guess
Is it possible that the IPN listener URL that CiviCRM is passing to PayPal includes my base domain (example.com) instead of the subdomain (client1.example.com)? I'm pretty sure that IP address in the log line above is PayPal. But I can't get Apache to log the domain name portion of the requested URL, so I'm not sure how to figure out if that's the problem.

EDIT: ok, figured out how to tell Apache to log the host, and PayPal is sending the request to the correct URL. So how do I debug what's happening?

Anyone have any suggestions as to what to try? Is there an example out there of how to get PayPal standard IPN working on a Drupal multisite install?

Thanks,
Ian