For thi software to work, you need a PayPal Payment Data Transfer to be enabled, and have a token to authenticate against.
1 .To get a PDT (Payment Data Transfer) token login to Paypal then goto your Profile Page
2. Click on Website Payment Preferences (As shown Below)
3. Turn on Auto Return. Put a URL in the Return URL field (EG: www.yourwebsite.com/wifi/success.php) This URL will be overruled by Our Config file, but we must have something there for PayPal.
4. Turn On Payment Data Transfer
5. Submit your changes, then go back into Website Payment Preferences, and copy & paste your Identity Token into config.inc.php.
Very Important, if token is NOT exactly like shown on the PayPal Page, IT WILL NOT WORK.
YOU MUST COPY AND PASTE THE TOKEN EXACTLY.
Hope this Helps!