title: realexpayment-got an error message after successful payment
body: <p>I am using realexpayment with amember-5.1.5 and using test account of realexpayment system.  </p>
  
  <p>when I signup and make payment using test card I am getting the following  message and it does not redirect back to our site:</p>
  
  <blockquote>
    <p>Your transaction has been successful but there was a problem connecting back to the merchant's web site. Please contact the merchant and advise them that you received this error message.</p>
  </blockquote>