Your email body is still referencing the recordset values using the old syntax like:
$row_rsConfirm['email']
instead of the new MySQLi syntax like:
$rsConfirm->getColumnVal('email')
The easiest way to fix the problem is to manually update the page:
webassist/email/waue_confirm_1.php to use the correct recordset references.... I've gone ahead and done that for you since I have ftp access.