I review all steps:
1-Carefully read the information about all settings on this page and adjust them adequately.
2-Make sure to fill in the primary email address of your PayPal account below on this page under PayPal.
3-Sign in to your PayPal account and in your account Profile’s My Selling Tools, enable Instant Payment Notifications and fill in the Notification URL. The URL to use is given on this page under URL.
4-In your PayPal account’s Profile Website Preferences enable Auto Return for Website Payments and input the Return URL that points to the appropriate page here on your site.
5- Enclose your PayPal buttons within the shortcode as outlined below or use any of the mentioned alternatives.
But when some one use the paypal button on the page, the tracking is not working.
Please do you have some tip or idea? Thanks