MySql errorr conn.open

MySqlConnection conn = new MySqlConnection("server= sql12.freesqldatabase.com;port=3306;database=sql12206166;User Id=sql12206166;password=R4qBiIdj88;charset=utf8");

        try
        {
            if (conn.State == ConnectionState.Closed)
            {
                conn.Open();
                textView1.Text = "open";
            }
        }
        catch (MySqlException ex)
        {
            new AlertDialog.Builder(this)
             .SetMessage(ex.ToString())
             .SetTitle("hala")
             .SetPositiveButton("Close", (sender, args) =>
              {

              })
              .Show();
        }

i have error in conn.open();
Unhandled Exception:

System.FormatException: Input string was not in a correct format. occurred