I have a php web site (in progress) where you when you make a purchase it adds credits to your user account. Paypal worked successfully. However, in the course of working on the site over time, I re-tested yesterday and for some reason Paypal purchases do not now add credits to the user account. I'm told it's a Paypal issue(not a PHP issue) and was told to generate a txt file, from my paypal_ipn.php, to see what (or when) it is being called? Can you tell me how to do this? What are your thoughts? Thanks