I have this strange issue with Excel.

I got this excel spreadsheet from a friend through email. When I try to hide
the some columns and save it everything seems to be fine. But when I open the
spreadsheet later on, it is back to the way my friend sent me initially. None
of the columns or rows that I tried to hide are hidden.

But when I do any changes in the data, the data gets saved. Can someone
please help me fix this issue. I am using Office 2003.

Thank you.
Vamshee