cant fill foreground color ?

[naved momin]

i m trying to make a mergeRegion and want to fill its foreGround color with yellow
but the below code makes a merge region but doesnt paint a color to it
can you tell me where i m wrong

public void preparingReport(Vector empReportDetails)
    {
        int addMergedRegion = sheet.addMergedRegion(new CellRangeAddress(0, (short)5, 0, (short)8));
        
        HSSFRow headerRow = sheet.createRow(addMergedRegion);
        HSSFCell headerCell = headerRow.createCell(0);
         FileInputStream input = null ;
        try {
           input = new FileInputStream("G:/multimedia/pics/1.jpg");
        } catch (FileNotFoundException ex) {
            Logger.getLogger(BMSreport1.class.getName()).log(Level.SEVERE, null, ex);
        }
        
        
        byte[] bytes = null ;
        try {
            bytes = IOUtils.toByteArray(input);
        } catch (IOException ex) {
            Logger.getLogger(BMSreport1.class.getName()).log(Level.SEVERE, null, ex);
        }
        
        int picIndex = workbook.addPicture(bytes, HSSFWorkbook.PICTURE_TYPE_JPEG);
        
        CreationHelper helper = workbook.getCreationHelper();
        
        
        Drawing drawing = sheet.createDrawingPatriarch();
        
        ClientAnchor anchor = helper.createClientAnchor();
        
        anchor.setCol1(0);
        anchor.setRow1(addMergedRegion);

        
        org.apache.poi.ss.usermodel.Picture pict =  drawing.createPicture(anchor, picIndex);
        pict.resize(1.5);
        
        addingOneBlankCaptionRegion(empReportDetails);
        
        
        
        
        
        
        try {
            workbook.write(output);
        } catch (IOException ex) {
            Logger.getLogger(BMSreport1.class.getName()).log(Level.SEVERE, null, ex);
        }
        try {
            output.close();
        } catch (IOException ex) {
            Logger.getLogger(BMSreport1.class.getName()).log(Level.SEVERE, null, ex);
        }
        
    }
    
    
    public static void main(String[] args) {
        // TODO code application logic here
        new BMSreport1().preparingReport(null);
    }

    private void addingOneBlankCaptionRegion(Vector empReportDetails) {
        int addMergedRegion2 = sheet.addMergedRegion(new CellRangeAddress(6, (short)7, 0, (short)8));
     
        HSSFRow blankRow1 = sheet.createRow(addMergedRegion2); //this part is creating a problem , it draws a region but i m unable to fill its forground color nor i can write using cell.setcellvalue(Object)
        HSSFCell blankCell = blankRow1.createCell(0);
    
       
        
        blankCell.setCellStyle(style);

       
        
        
    }