Excel 97 document doesnt run properly in Excel 2003

I have a user who has a spreadsheet which was made in office 97 which also has links to other spreadsheets, in this spreadsheet there are a lot of graphs, these show when opened in 97 but when opened in 2003 it doesnt display the results and most of the fields are filled with ###### or N/A.

Does anyone have any ideas, im quite desperate for a resolution.