title: Paypal Payflow Pro :- getting error 23 "Invalid account number"
body: <p>I am performing a Paypal Payflow transaction. When I use the sandbox account and dummy credit card details, it work's fine, but when i use original url and correct credit card details, an error raised. The response is given below :- </p>
  
  <p><strong>Array
  (
      [RESULT] => 23
      [PNREF] => BR1PC926FBA3
      [RESPMSG] => Invalid account number: 15006-This transaction cannot be processed. Please enter a valid credit card number and type.
      [AVSADDR] => N
      [AVSZIP] => N
      [CVV2MATCH] => N
      [HOSTCODE] => 15006
      [PROCAVS] => N
      [PROCCVV2] => N
      [IAVS] => N
  )</strong></p>
  
  <p>The error shows that the credit card number is incorrect, but i used the correct credit card number and type.</p>
  
  <p>Please help.</p>