I work on c#5 app I face Issue Cannot create multiple Excel files With Multiple Excel Sheets With multiple Modules

that mean one file have multiple Tab or sheet and every sheet have multiple modules with data .

suppose I have data table dt and return data below as Input :

Code:
Create Multiple Output Excel File with Multiple Tab with Multiple Module					
PartId	Company	Files	    Tab	Module	
1222	          micro	Abc	     source	1	
1321           silicon	Abc	      Types	3	
1444	          cd2	       AutoD        Rev	10	
1321	          cd3	       AutoD	source	11	
1541	          tvs	      AutoD	        Rev	12	
9811	          tvs2      Mog	    Dal	5	
1901	          tvs       Mog	Mondo	6	
2111	          toyo     Mog	Pingo	7
what I try

Code:
 DataSet ds = new DataSet();
                        var result = from rows in dt.AsEnumerable()
                                     group rows by new { Files = rows["Files"] } into grp
                                     select grp;
                        foreach (var item in result)
                        {
                            ds.Tables.Add(item.CopyToDataTable());
                        }
                        Affected = new CExcel().createExcelFileForDs(ds, exportPath);


 public Boolean createExcelFileForDs(DataSet ds, String FullFilePathName)
        {
            Boolean IsDone = false;
            try
            {
                FileInfo CreatedFile = new FileInfo(FullFilePathName);
                Boolean ISNew = false;
                if (!CreatedFile.Exists)
                {

                    ISNew = true;
                }
                using (var pck = new ExcelPackage(CreatedFile))
                {
                    ExcelWorksheet ws;
                    foreach (DataTable Table in ds.Tables)
                    {
                        if (ISNew == true)
                        {
                            ws = pck.Workbook.Worksheets.Add(Convert.ToString(Table.Rows[0]["Tab"]));
                            ws.Cells.Style.Font.Size = 11; //Default font size for whole sheet
                            ws.Cells.Style.Font.Name = "Calibri"; //Default Font name for whole sheet    
                            if (System.Threading.Thread.CurrentThread.CurrentCulture.TextInfo.IsRightToLeft)   // Right to Left for Arabic lang
                            {
                                ExcelWorksheetView wv = ws.View;
                                wv.ZoomScale = 100;
                                wv.RightToLeft = true;
                                ws.PrinterSettings.Orientation = eOrientation.Landscape;
                                ws.Cells.AutoFitColumns();
                            }
                            else
                            {
                                ExcelWorksheetView wv = ws.View;
                                wv.ZoomScale = 100;
                                wv.RightToLeft = false;
                                ws.PrinterSettings.Orientation = eOrientation.Landscape;
                                ws.Cells.AutoFitColumns();
                            }
                            ws.Cells.AutoFitColumns();
                            ws.Cells[1, 1].LoadFromDataTable(Table, ISNew, OfficeOpenXml.Table.TableStyles.Light8);
                        }

                        else
                        {
                            ws = pck.Workbook.Worksheets.FirstOrDefault();
                            ws.Cells[2, 1].LoadFromDataTable(Table, ISNew);
                        }
                    }
                    pck.Save();
                    IsDone = true;

                }
            }
            catch (Exception ex)
            {

                throw ex;
            }
            return IsDone;
        }
Expected Result as Image :
http://www.mediafire.com/view/w8pw3w...files.png/file