in the inc/cart.php page, change the following code:
<?php
// WA eCart Redirect
if ($eCart->redirStr != "../cart.php") {
header("Location: ".$eCart->redirStr);
}
?>
to:
<?php
// WA eCart Redirect
if ($eCart->redirStr != "") {
header("Location: ".$eCart->redirStr);
}
?>