ok, that makes more sense. It's always helpful to provide as much details as possible when reporting a problem.
in the security_assist/helper_php.php file, find the following code:
if (isset($_SESSION["WA_MailObject_Status"]) && $_SESSION["WA_MailObject_Status"] == "Success") {
and change it to:
if (isset($GLOBALS["WA_MailObject_Status"]) && $GLOBALS["WA_MailObject_Status"] == "Success") {
it may occur more than once, you will need to change all instances.