winform picturebox не отображает JPEG byte из SQL

этот код отображает фото из датабейз Nortwind из таблицы Categories

другие данные отображается, но фотки нет. Ошибка "parametr is not valid" код этот в ADO.NET c#

   private void DisplayDatabaseImageForm_Load(object sender, System.EventArgs e)
    {
        // create the DataSet
        ds = new DataSet();
        // create the DataAdapter and retrieve the Employees table
        String selectCommand = "SELECT EmployeeID, LastName, FirstName FROM Employees";
        SqlConnection con = new SqlConnection("Data Source=ADMIN-ПК\\SQLEXPRESS;Initial Catalog=Northwind;Integrated Security=True");
        da = new SqlDataAdapter(selectCommand,con);
        da.FillSchema(ds, SchemaType.Source, "Employees");
        da.Fill(ds, "Employees");
        // bind several table fields to controls
        employeeIdTextBox.DataBindings.Add("Text", ds, "Employees.EmployeeID");
        lastNameTextBox.DataBindings.Add("Text", ds, "Employees.LastName");
        firstNameTextBox.DataBindings.Add("Text", ds, "Employees.FirstName");
        // get the binding manager base for the Employees table
        bm = BindingContext[ds, "Employees"];
        // update the image in response to each record reposition
        bm.PositionChanged += new EventHandler(bm_PositionChanged);
        // update the display for the first record
        bm_PositionChanged(null, null);
    }
    private void bm_PositionChanged(Object sender, EventArgs e)
    {
        // refresh the photo displayed when the current record changes
        // get the new EmployeeID using the BindingManager
        int employeeId = (int)ds.Tables["Employees"].Rows[bm.Position]["EmployeeID"];
        // create a connection
        SqlConnection conn = new SqlConnection("Data Source=ADMIN-ПК\\SQLEXPRESS;Initial Catalog=Northwind;Integrated Security=True");
        // create a command to retrieve the employee photo
        String sqlText = "SELECT Photo FROM Employees WHERE EmployeeID=" + employeeId;
        SqlCommand cmd = new SqlCommand(sqlText, conn);
       // retrieve the employee photo to a stream
        conn.Open();
        Byte[] image = (Byte[])cmd.ExecuteScalar(); ;
        MemoryStream ms = new MemoryStream(image);
        conn.Close();
        // load the image into the PictureBox from the stream
        photoPictureBox.Image = Image.FromStream(ms);
        ms.Close();
    }