Ok Guyts I find the problem!
The file PaypalIPN.php do not be created and the first information in paypal it's a old url.
I criated the file and update the url, and it's ok.
So anothter problem it's the shopping cart it's not empty. After concluded this purchase with success, the product stays in the shopping cart and if you return to buy another product, your shopping cart have (now) 2 products.... The new and the old.
What is the problem? whi the shopping cart don't be erase after the finish purchase?
