Problem exporting multiple tabs for Excel 2003

HGREN

Hi, I am having trouble with function for exporting to Excel 2003. It works fine with Excel 2007 export for multiple excel tab wrokspace, but when it comes to 2003 it only got one tab exported and all the formatting are messed up.

Screenshots attached with the correct Excel 2007 export and the wrong formatting and missing tabs of Excel 2003 export.

Below are my copy for calling Excel 2003 and 2007 exports, please help!

using (FastReport.Export.OoXML.Excel2007Export export = new FastReport.Export.OoXML.Excel2007Export())
            {
                export.Export(report, savePath);
                report.Dispose();
            }

using (FastReport.Export.BIFF8.Excel2003Document export = new FastReport.Export.BIFF8.Excel2003Document())
            {
                export.Export(report, savePath);
                report.Dispose();
            }