Why Don't This Little Query Work For Me

hello everybody!
I'm using ssce.
I'm trying to add the followed query in my table adapter but in the query builder (VS), when I choose execute query, I get a couple of textboxes but whatever I type in, I get an error message "The parameter is wrong"

here is the query:
SELECT EntryID, UserInfo, Kind, ActionDate, Span, SalaryAtAction
FROM Logbook
WHERE
((CASE
WHEN @Enter = 0 AND @Exit = 0 THEN 0
WHEN @Enter = 1 AND @Exit = 0 AND kind = '?????' THEN 1
WHEN @Enter = 0 AND @Exit = 1 AND kind = '?????' THEN 1
WHEN @Enter = 1 AND @exit = 1 AND kind IN ('?????', '?????') THEN 1 ELSE 0 END) = 1)

what I try to implement is, a table that one of it's columns is bit datatype. the end-user can filter out the table by these parameters whether to show only the true rows or only the false rows or both.

would you suggest to use a different various of the query?

(a help button is provided on the error message, it refers to ]ms-help://MS.VSCC.v90/MS.MSDNQTR.v90.en/dv_vdt03/html/f0bf6b59-c245-4340-a869-5d7278fe0ae5.htm in case it helps anybody).

Shimi