teo

I followed the steps as of chapter 6 - "Enabling IPN" and entered: https://localhost/ullman_ecomm_2nd/ex1/html/ipn.php in "Notification URL" required field, selecting "Receive IPN Messages (Enabled)" too. After clicking "Save", I received the error message: " The domain name you have entered is not a valid IPN URL. Please enter the URL where you have installed your IPN script. " I mention that, during the creation of the PayPal button "Subscribe" I used a similar URL https://localhost/ullman_ecomm_2nd/ex1/html/thanks.php that worked perfect. What should I do??? Thanks in advance.