title: PayPal Pro - PayFlow: setExpressCheckout API call returns "Not signed up for this tender type"
body: <p>I am using Express Checkout with Payflow Gateway on a test account.</p>
  
  <p>I try to send a setExpressCheckout call to start the Express Checkout basic integration, following the guide in <a href="https://developer.paypal.com/docs/payflow/express-checkout/sale/#setexpresscheckout" rel="nofollow noreferrer">Payflow/Express-Checkout - SetExpressCheckout</a>.</p>
  
  <p>The response I get is: </p>
  
  <blockquote>
    <p>[RESULT] => 25 [RESPMSG] => Not signed up for this tender type.</p>
  </blockquote>
  
  <p>After checking the meaning of this error I found there are 3 options why I get result code 25: </p>
  
  <ul>
  <li>Card type not on account</li>
  <li>Original transaction ID not valid</li>
  <li>Empty Credit Card field</li>
  </ul>
  
  <p>I am not passing credit card data or original transaction ID (not ones of setExpressCheckout call), So 3 of them did not help...</p>
  
  <p>Any Idea?</p>