Cann't connect to DB on 000webhost.com

MySqlConnectionStringBuilder conn_string = new MySqlConnectionStringBuilder();
            conn_string.Server = "mysql8.000webhost.com";
            conn_string.UserID = "a1613857_***";
            conn_string.Password = "*****";
            conn_string.Database = "a1613857_****";

            //SqlConnection conn = new SqlConnection(conn_string.ConnectionString);
            using (MySqlConnection conn = new MySqlConnection(conn_string.ToString()))
            using (MySqlCommand cmd = conn.CreateCommand())
            {    
                try
                {
                    conn.Open();
                    MessageBox.Show("DB is Open");
                }
                catch(Exception ex)
                {
                    MessageBox.Show("No Connection to DB");
                    MessageBox.Show(ex.Message);
                }

                finally
                {
                    conn.Close();
                }
                
            }