Database Setup Wizard doesn't change username

Database Setup Wizard doesn't change username

Hi,
I need to change the MS SQL login that is used by the SDP product to connect to our MS SQL database. The login has dbo permissions on the database. When I use the changeDBServer.bat utility to do this (see image below) it does not appear to change the login. I enter all the details and click the Test button, which is successful as it returns a message of 'Connection Established'. However, when I then click on the Save button nothing appears to happen. See below....
 

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