Hidden sheets becoming visible after saving from Browser
 

An excel workbook with multiple sheets is saved in 2000
and published to the browser with some of the sheets
hidden. The report is run in the browser, but when saved
back to excel from the Browser, the hidden sheets become
visible. From the Browser, I have to save as Excel 97
(*.xls). When I open the saved file in Excel, the hidden
sheets are now visible. How do I keep the sheets hidden
when saving from the Browser?