Error code
i managed to get the error codes eventually using this...
<?php
if(!session_id()) session_start();
echo "<p>Payflow Pro: <br />";
echo "Full Response: ".(isset($_SESSION["PP_PayPro"])?htmlentities($_SESSION["PP_PayPro"]):"n/a")."<br /></p>";
echo "<p>Payflow Pro: <br />";
echo "Full Request: ".(isset($_SESSION['PP_PayPro_postedValues'])?htmlentities($_SESSION['PP_PayPro_postedValues']):"n/a")."<br />";
?>
So thats part of the problem solved.
Still interested in a view re successful transactions in the testing environment