I am having an issue with a SQL Statement WHERE Clause in SQL Server 2008, I get the message "incorrect syntax near '=' ?

I am using SQL Server 2008 and I suspect I need to replace part of my SQL Statement WHERE clause:

WHERE StopVoidPay.userid = tbl_CSL_users.msidOld))= False))
with
WHERE StopVoidPay.userid != tbl_CSL_users.msidOld))

but I get confused with the placement of opening and closing parenthesis as follows:

SELECT
bank.entity,
tbl_CSL_StopVoidPay.bank,
tbl_CSL_StopVoidPay.userid,
tbl_CSL_StopVoidPay.dtCreated,
tbl_CSL_StopVoidPay.chkNum,
tbl_CSL_StopVoidPay.branch,
tbl_CSL_StopVoidPay.chkDt,
tbl_CSL_StopVoidPay.accountNum,
tbl_CSL_StopVoidPay.amount,
tbl_CSL_StopVoidPay.typeSV
FROM tbl_CSL_bank INNER JOIN tbl_CSL_StopVoidPay ON tbl_CSL_bank.bankID = tbl_CSL_StopVoidPay.bank
WHERE (((tbl_CSL_StopVoidPay.typeSV)='S') AND
((Exists (SELECT msidOld
FROM tbl_CSL_users
WHERE StopVoidPay.userid = tbl_CSL_users.msidOld))= False))   <---- Line 16
ORDER BY StopVoidPay.chkNum;

Msg 102, Level 15, State 1, Line 16
Incorrect syntax near '='.

Do you know how I can resolve this?