I have a valid API because Paypal Express works. Now, I can't get Paypal Standard to work. I ran the installation in Dreamweaver. When I try to checkout, I get this Paypal error:
We cannot process this transaction because there is a problem with the PayPal email address supplied by the seller. Please contact the seller to resolve the problem. If this payment is for an eBay listing, you can contact the seller via the "Ask Seller a Question" link on the listing page. When you have the correct email address, payment can be made at www.paypal.com.