Thanks a lot Jason, ok I upgraded the cart version and used a new name, and now works, however, when I try to pay using paypal standard ( only payment type I have ) I got this:
Return to Merchant
Unable to process payment. Please contact the merchant as the shipping address provided by the merchant is invalid, and the merchant has requested that your order must be shipped to that address.
Also, in the confirmation page, if I click on modify information, the system returns me to the prior page where I input the text fields but without values, how can I have those values always there?
I'm attaching the site files without images, thank you for your help!