Unexpected Existing Transaction - Error

 Hi,
My code worked fine before i placed "SqlTransaction" command in my code. Now it is showing "Unexpected existing transaction." Please tell me where I am going wrong.
My Code: 
 



























































protected void
Page_Load(object sender, EventArgs e)

    {

        using (SqlConnection con = new
SqlConnection(ConfigurationManager.ConnectionStrings["Mfund_String"].ConnectionString))

        {

             con.Open();

             using (SqlConnection destinationConnection = new SqlConnection(ConfigurationManager.ConnectionStrings["Mfund_String"].ConnectionString))

             {

              
  destinationConnection.Open();

                 using (SqlTransaction transaction =
destinationConnection.BeginTransaction())

                 {

                
    SqlCommand DelCmd = new
SqlCommand("delete
from mfund_data", con);

                     DelCmd.ExecuteNonQuery();

                         using (SqlBulkCopy bulkCopy = new
SqlBulkCopy(destinationConnection))

                         {

                             bulkCopy.DestinationTableName = "mfund_data";

                            
try
                             {

                                 bulkCopy.WriteToServer(CreateDataTableFromFile());

                      
          transaction.Commit();

                             }

                             catch
(Exception ex)

                             {

                                 transaction.Rollback();

                                 Response.Write(ex.Message);

                             }

                         }

                     }

                     destinationConnection.Close();
 
                 }

             
   con.Close();

             }

             }Regards,
Jagadeesh