Trouble With Single Quotes

Hello Everyone!

I am having a problem with updating a password within a table. Below is the old and new password that needs to be updated.
Old2"3("-"3#@(%P="''_DD@D*
New :"I+)#]*1#E,%R-''7^,TEA$X&^O_-68DIK,@

Below is the query that I am trying to run. I believe my problem is becuase of the Single Quotes found within both the old and new password.

I have tried to escape the single quotes, @local_variable, CHAR(39) and other ways of playing with the string. I cannot seem to find a solution.

If you were to ignore the update statement, the SELECT statement would return no results even though the PRINT statement displays the required data.
This is what baffles me and why I cannot run the UPDATE statement, becuase of course, nothing would be updated since no results were returned.

Can anyone offer their assistance?

Thank you in advance.

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DECLARE
@OLD_PASSWORD VARCHAR(50),
@NEW_PASSWORD VARCHAR(50)

-- 2"3("-"3#@(%P="''_DD@D* ///// The old password.

SET @OLD_PASSWORD = '2"3("-"3#@(%P="' + CHAR(39) + CHAR(39) + '_DD@D*'

-- :"I+)#]*1#E,%R-''7^,TEA$X&^O_-68DIK,@ ///// The new password.

SET @NEW_PASSWORD = ':"I+)#]*1#E,%R-' + CHAR(39) + CHAR(39) + '7^,TEA$X&^O_-68DIK,@'

PRINT @OLD_PASSWORD
PRINT @NEW_PASSWORD

SELECT *
FROM Credentials
WHERE
Is_Active = 1 AND
[Password] = @OLD_PASSWORD

/* Attempt to update the password table. */
UPDATE Credentials
SET [Password] = @NEW_PASSWORD
WHERE [ID] IN
(SELECT [ID]
FROM Credentials
WHERE
Is_Active = 1 AND
[Password] = @OLD_PASSWORD )