PayPal error: The requested URL /pp_confirm.php was not found on this server.
I used the sandbox to do test paypal transactions and everything worked fine.
I then entered my live API credentials and deselected the Use Sandbox feature in the server behaviors.
When testing live using PayPal, everything looks good until the last PayPal submit button and then I get the following error: Not Found
The requested URL /pp_confirm.php was not found on this server.
Any idea what I have done wrong?