Unable to connect to any of the specified mysql hosts

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C#

I'm trying to connect C# with MySQL in 000webhost but it doesn't work.
My code:

What I have tried:

private void Form1_Load(object sender, EventArgs e)
{
try
{
connection = new MySqlConnection("Server=levukhanh270896.000webhostapp.com;Database=id5762970_car_parking;Uid=id5762970_khanhlevu;Pwd=123456;");
connection.Open();
if (connection.State == ConnectionState.Open)
{
label1.Text = "Connected";
label1.ForeColor = Color.Green;
}
else
{

label1.Text = "Not Connected";
label1.ForeColor = Color.Red;
}
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
}