MySQLBackup Too many arguments to 'Public Sub New() VB .NET

 Sub db_backup()
        Dim conn As MySqlConnection = New MySqlConnection("server=localhost;user id=username; password=;database=DBname;")
        Dim cmd As MySqlCommand = New MySqlCommand
        cmd.Connection = conn
        conn.Open()
        'Call connection_string()
        'MysqlConn.Open()
        Dim mb As MySqlBackup = New MySqlBackup(conn)
        mb.ExportToFile("C:\backup.sql")
        conn.Close()
    End Sub