xml file -DataSet- Crystal Report

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ASP.NET

I Bind crystal report to xml file it's input from created dataset ,the prob here that it's doesn't refresh each time i press the button the old values pops up
Is there is any way to solve it !!?

Code:
DataSet DS= CreateDataSet_TempEmp();

using (System.Data.SqlClient.SqlConnection con = new SqlConnection(ConfigurationManager.ConnectionStrings["ManPowerConnectionString"].ConnectionString))
{
con.Open();
SqlCommand Cmd = new SqlCommand();
Cmd.CommandType = CommandType.StoredProcedure;
Cmd.CommandText = "SP_Rprt_TempEmp";
Cmd.Connection = con;
Cmd.Parameters.Add("@Temp_File_No", SqlDbType.Int).Value = FileNo;
Cmd.Parameters.Add("@Qualification", SqlDbType.Int).Value = Qualifi;
Cmd.Parameters.Add("@Temp_Emp_Name", SqlDbType.NVarChar, 200).Value = EmpName;
Cmd.Parameters.Add("@Temp_BirthDate_From", SqlDbType.Date).Value = FrmDate;
Cmd.Parameters.Add("@Temp_BirthDate_To", SqlDbType.Date).Value = ToDate;
Cmd.Parameters.Add("@Temp_Dist", SqlDbType.Int).Value = Dist;
Cmd.Parameters.Add("@Temp_Disabled", SqlDbType.Bit).Value = Disabled;


SqlDataReader DR = Cmd.ExecuteReader();
if (DR.HasRows)
{
while (DR.Read())
{
DataRow Dr = DS.Tables["TempEmp"].NewRow();
Dr["Qualification"] = DR[0];
Dr["Temp_Emp_name"] = DR[1];
Dr["Temp_File_No"] = DR[2];
Dr["Temp_Birthdate"] = DR[3];
Dr["Disabled"] = DR[4];
Dr["Temp_Job"] = DR[5];
Dr["District"] = DR[6];
DS.Tables["TempEmp"].Rows.Add(Dr);
}
DR.Close();
//System.IO.File.Delete("c:\\TempEmp.xml");
DS.WriteXml("c:\\TempEmp.xml");
Response.Redirect("Rprt_TempEmp.aspx");
}
con.Close();