serial port data received and placeing in excel

See more:

C#

C#4.0

hi,
am receing data from serialport, for testing am taking two applications.
am receiving from serialport ,and placing in excel in button click.

Here is the code for receiving and placing:

private void Download_Click(object sender, EventArgs e)
      {

          try
          {
              Excel.Application xlApp = default(Excel.Application);
              Excel.Workbook xlWorkBook = default(Excel.Workbook);
              Excel.Worksheet xlWorkSheet = default(Excel.Worksheet);

              object misValue = System.Reflection.Missing.Value;
              xlApp = new Excel.Application();
              xlWorkBook = xlApp.Workbooks.Add(misValue);
              xlWorkSheet = (Excel.Worksheet)xlWorkBook.Worksheets.get_Item(1);
              xlWorkSheet.Cells[1, 1] = "Name";
              xlWorkSheet.Cells[1, 2] = "ID Number";
              xlWorkSheet.Cells[1, 3] = "Installment";
              xlWorkSheet.Cells[1, 4] = "Paid Amount";
              xlWorkSheet.Cells[1, 5] = "Due Amount";

              xlWorkSheet.Cells[1, 1].Interior.ColorIndex = 39;
              xlWorkSheet.Cells[1, 2].Interior.ColorIndex = 39;
              xlWorkSheet.Cells[1, 3].Interior.ColorIndex = 39;
              xlWorkSheet.Cells[1, 4].Interior.ColorIndex = 39;
              xlWorkSheet.Cells[1, 5].Interior.ColorIndex = 39;



              serialPort1.DataReceived += new SerialDataReceivedEventHandler(serialPort1_DataReceived);

              string[] lines = Regex.Split(s, "[$#,]");
              foreach (String line in lines)
              {
                  // MessageBox.Show("split Value:" + line);
                  if (line != "")
                  {

                      for (int p = 2; p < 50; p++)
                      {
                          for (int q = 0; q < 7; q++)

                              xlWorkSheet.Cells[p, q] = line;  //here is the error place

                      }

                  }
              }



              xlWorkBook.SaveAs(fName, Excel.XlFileFormat.xlWorkbookNormal, misValue, misValue, misValue, misValue, Excel.XlSaveAsAccessMode.xlExclusive, misValue, misValue, misValue, misValue, misValue);
              xlWorkBook.Close(true, misValue, misValue);
              xlApp.Quit();
              releaseObject(xlWorkSheet);
              releaseObject(xlWorkBook);
              releaseObject(xlApp);
          }
          catch (Exception p)
          {
              MessageBox.Show(p.Message);
          }
          finally
          {
              if (xlApp != null)
                  releaseObject(xlApp);
              if (xlWorkBook != null)
                  releaseObject(xlWorkBook);
              if (xlWorkSheet != null)
                  releaseObject(xlWorkSheet);
          }
          if (System.IO.File.Exists(fName))
          {
              if (MessageBox.Show("Would you like to open the excel file?", this.Text, MessageBoxButtons.YesNo, MessageBoxIcon.Question) == DialogResult.Yes)
              {
                  try
                  {
                      System.Diagnostics.Process.Start(fName);
                  }
                  catch (Exception ex)
                  {
                      MessageBox.Show("Error opening the excel file." + Environment.NewLine +
                        ex.Message, this.Text, MessageBoxButtons.OK, MessageBoxIcon.Error);
                  }
              }
          }

      }


      private void releaseObject(object obj)
      {
          try
          {
              System.Runtime.InteropServices.Marshal.ReleaseComObject(obj);
              obj = null;
          }
          catch (Exception ex)
          {
              obj = null;
              MessageBox.Show("Unable to release the Object " + ex.ToString());
          }
          finally
          {
              GC.Collect();
          }
      }

      private void serialPort1_DataReceived(object sender, System.IO.Ports.SerialDataReceivedEventArgs e)
      {
          try
          {
              /*  for (int p = 0; p <2; p++)
                {
                    inputdata = serialPort1.ReadExisting();
                    MessageBox.Show("Read:" + inputdata);

                }*/
              if (inputdata == "$M121,0#")

                  MessageBox.Show("value is:" + inputdata);

              else
              {
                  if (!serialPort1.IsOpen)
                      return;

                  Thread.Sleep(50);
                  byte[] buffer = new byte[serialPort1.BytesToRead];
                  serialPort1.Read(buffer, 0, buffer.Length);

                  s = System.Text.ASCIIEncoding.ASCII.GetString(buffer);
                 // MessageBox.Show(s);


              }
          }
          catch (Exception ex)
          {
              MessageBox.Show(ex.Message);
          }

      }

but am getting error while storing in excel; as

COM Exception unhandled:Exception from HRESULT: 0x800A03EC

and stacktrace is:
System.Runtimetype.ForwardCallToInvokeManager(String MemberName,bindingFlags flag,Object target,Int32[] a Wrapper Types,messageData&msgdata)

at Microsoft.Office.Interop.Excel.Range.Set_Default(Object RowIndex, Object ColumnIndex,Object value)

Already i added column names at row 1.and trying to insert data from 2nd row onwards