Please be sure you are passing the seller ID (sid) value as your 2Checkout account number not your 2Checkout username. This is most likely the problem you are having. If this is not the issue, then submit a Help Desk Ticket below and give us a link so we can do a test purchase on [...]
Each button added to the page needs to have its own opening and closing form field. This tells the browser that each form is separate, and not part of the same one. The following correct example generated two separate buy buttons: <form action=”https://www.2checkout.com/checkout/purchase” method=”post”> <input type=”hidden” name=”sid” value=”XXXXXX” /> <input type=”hidden” name=”product_id” value=”10″ /> <input [...]
