Insert Data in xls sheet at server from dataset with Microsoft.Jet.OLEDB

private void WriteExcel(DataTable dataTable)
       {
           string docupath = ConfigurationManager.AppSettings.Get("LMSFilePath");

           string filePath = MapPath(docupath);

           string connectionString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + filePath + ";Extended Properties=Excel 8.0;";
               OleDbConnection connection = new OleDbConnection(connectionString);
               try
               {
                   connection.Open();
                   DataTable MyTable = dataTable;
                   string nonQuery = "INSERT INTO [Sheet1$] IN 'filePath' 'Excel 12.0;' SELECT * FROM [MyTable]";

                   //set up first query
                   OleDbCommand selectCommand = new OleDbCommand(nonQuery);
                   selectCommand.Connection = connection;


                   selectCommand.Transaction = connection.BeginTransaction();
                   selectCommand.ExecuteNonQuery();

                   selectCommand.Transaction.Commit();
                   connection.Dispose();
                   connection.Close();
               }

               catch (Exception)
               {

               }

selectCommand.ExecuteNonQuery();

The Microsoft Jet database engine could not find the object 'MyTable'.  Make sure the object exists and that you spell its name and the path name correctly.