I changed the SA password and Visual Studio can not map Bank objects

I have changed the password of my SA SQL Server user by Management Studio. I tested it in Management and everything went well, I created a 'Test' database with a table called 'Testing' and I went to test with Visual Studio     Home I created a Windows Forms Application in VS, went to DataSource, chose DataBase > DataSet > New Connection and I connected     

Picture of the Add Connection Window     Home I tested the connection in the window and gave 'Test connection succeeded', but at the time of choosing the DataSet objects from:     Home An error occurred while retrieving the information from the database:     Home Failed to retrieve data for this request.     Home Failed to connect to server. \ SQLEXPRESS.     

Image of the Error Window     Home I would like to know why visual studio connects to the bank in the new connection window, but not at the time of adding the objects     Home I have already changed the SQL Server password to old and still give this error.     


Note: When I put the password in the connection part, the error disappears. Has Visual Studio written the old SQL Server password and can not update itself?     

Image of the Test Connection window with remember password     

Image of the Select Bank Objects Window - WITHOUT ANY ERROR     Home I'm desperate, help me!