Connect to mysql and excuting crystal report

I am trying to execute the crystal report with below code but I dont know what is going wrong .

Here is my connection class to mysql 

-------------------------------------------------------------------------------------

namespace schoolbell

{

class con_db

{

private static string Database = "scbell";

private static string Server = "localhost";

private static string Password = "";

private static string Username = "";

private static string constring = "Server=" + Server + ";" + "Database=" + Database + ";" + "Uid=" + Username + ";" + "Password=" + Password + ";";

public static MySqlConnection con = new MySqlConnection(constring);

public con_db()

{

}

}

}

========================

try

{

Cursor = Cursors.WaitCursor;

timer1.Enabled = true;

CrystalReport3 rpt = new CrystalReport3();

MySqlCommand con = new MySqlCommand();

MySqlDataAdapter myda = new MySqlDataAdapter();

DataSet myds = new DataSet();

con = new MySqlConnection(con_db.con);

// Here I have error 

con.Connection = MySqlCommand(con_db.con);

// 

con.CommandText = " select *from feest ";

con.CommandType = CommandType.Text;

myda.SelectCommand = con;

myda.Fill(myds,"feest");

rpt.SetDataSource(myds);

feestru fm = new feestru();

fm.crystalReportViewer1.ReportSource = rpt;

fm.Visible = true;

}

catch (Exception ex)

{

MessageBox.Show(ex.StackTrace,"Error",MessageBoxButtons.OK,MessageBoxIcon.Error);

}

}

Regards 

anand