This SQL code is not working

SELECT tt.[Member ID],
       tt.Contact,
       tt.DOB,
       cl.[Member ID],
       cl.Contact,
       cl.DOB
  FROM (SELECT cl.[Member ID],
               cl.Contact,
               cl.DOB,
               tt.[Member ID],
               tt.Contact,
               tt.DOB
          FROM twothousandsone AS tt LEFT OUTER JOIN
               ContactList AS cl ON tt.[Member ID] = cl.[Member ID]
         WHERE cl.[Member ID] IS NULL
       ) AS nt LEFT OUTER JOIN
       dbo.ContactList cl (ON nt.Contact = cl.Contact)
 WHERE cl.Contact Is NULL
   AND cl.DOB IS NULL

Hello a team member in a different forum has helped me a lot and I owe him for helping me on this script and brought this code to this point. But still it is not working, any help? Regards GGGGGNNNNN

GGGGGNNNNN