Query Fails to Bind

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I am passing the following query results through cfreport

SELECT user_name
,'' fullname
,'' present
,max(login_date) lastlogin
,max(logout_date) lastlogout
,max(date_updated) lastupdate
FROM Users
WHERE(user_name NOT IN ('AD', 'BR', 'TL, 'TC'))
group by user_name
ORDER BY user_name

Without lastlogin, lastlogout and lastupdate the report works fine.
When I try to use them I get a bind error on the report. I'm adding the variables under query fields. The report doesn't seem to see them.
Any ideas?
Thanks.