File not saved on different computer using outputstream and jfilechooser

I am trying to edit inside a .xls file using Apache poi library. All the updation is succesfull on local computer.But, i am stuck when jar file of application does not saved excel file on computer on which it is installed.

            FileChooser fileChooser = new FileChooser();
            fileChooser.setTitle("Generated data of Dvat ");
            fileChooser.setTitle("Generate XLS File of " + "Dvat 31");
            fileChooser.getExtensionFilters().addAll(
                    new ExtensionFilter("XLS Files", "*.xls"));
            fileChooser.setInitialFileName(Common
                    .replaceWhiteSpaceAndSlash("Dvat31")
                    + "_"
                    + Common.replaceWhiteSpaceAndSlash(Common.comp.getName()+"_")
                    +this.fromdate+"_"+this.todate+ ".xls");
            fileChooser.setInitialDirectory(new File(System
                    .getProperty("user.home") + "/Desktop"));

            File selectedFileName = fileChooser.showSaveDialog(null);
            if(selectedFileName!=null)
            {
            String fileName=absolutePath;
            HSSFWorkbook wb = HSSFReadWrite.readFile(fileName);
            FileOutputStream stream = new FileOutputStream(selectedFileName.getAbsolutePath());

      // Updation On .xls Sheet.
                    row = sheet.getRow(34);
                for(int i=1;i<=12;i++)
                {
                    if(i==4)
                    {
                        cell=row.getCell(i);
                        cell.setCellValue(this.consignmentTotal);

                    }
                }
       // Closing workbook and outputstream.
      wb.write(stream);
            stream.close();
            wb.close();