Formatting Error While Reading Excel File using POI 2.5 Final Related

Hi All,
I am using poi-2.5-final-20040302.jar for my project to create excel files.
My system is having Microsoft Excel 2002 (SP-2) version, but my client is having Microsoft Office Excel 2003 (SP-3).
My problem is that I can download the excel file with no formatting issues , but client is not able to download the same and is getting error as
"Damage to the file was so extensive that repairs were not possible.Excel attempted to recover your formulas and values, but some data might have been lost or corrupted".
After getting above error message, they can open the file but the colours,fonts ie formatting will be lost and only data will be available in excel.
Can anyone help how to sort out ths issue.
Thanks in Advance,
Ravi

Sound like the Excel file is invalid... Maybe its outdated or corrupted or something. What would we know about that? POI has a mailing list.

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