error when opening a spreadsheet in Excel 2003
 

Hi, I have a quick question about Excel 2003. I have just installed Excel
2003 on a computer that is also running Office 2000. When I open a
spreadsheet that is used and opened by multiple users (as this is a shared
spreadsheet that keeps track of booking a meeting room) who use both Excel
2000 and Excel 2003, I get the following error message: Excel encounterd an
erro and had to reformat the workbook. The workbook could have been
corrupted. What would cause this error message to occur each and everytime I
open the workboox in Excel 2003 and how do I get rid of this error.

Edward