How Do I Connect A Crystal Report To A C# Windows Form,

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C#

CrystalReports

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Error machine on target machine while refreshing report on target machine

Failed to open the connection.
Details: [Database Vendor Code:17]
Failed to Open Connection.
payments11 {D29B3531-EF7D-426E-B1DB-05CD2A63FA5F}.rpt
Details : [Database Vendor Code:17]

this is my coding part :

private void Preview_Click(object sender, EventArgs e)
        {
            SqlConnection cnn;
            string connectionString = null;
            string sql = null;

            connectionString = @"Data Source=.\SQLEXPRESS;Initial Catalog=trydb_1;Integrated Security=True";
            cnn = new SqlConnection(connectionString);
            cnn.Open();
            sql = "SELECT ID,pay_id,date,custname,description,chqno,duedate,accname,amount FROM payments";
            SqlDataAdapter dscmd = new SqlDataAdapter(sql, cnn);
 ReportDocument cryRpt = new ReportDocument();
            cryRpt.Load(@"D:\Completing\WindowsFormsApplication1\payments11.rpt");
            crystalReportViewer1.ReportSource = cryRpt;
            crystalReportViewer1.Refresh();
}

While refreshing the crystal report on users/target machine it shows the above error. But reports are running on my machine. Error on target machine.