I had an .xls in Excel 95 that used multipage forms. This .xls and the forms
works fine in XP (Excel 2003) if I use it without any changes.

The moment I make even a single change in the form and use it, it still
works fine till the time I save the .xls and close .xls. Once I do this and
re-open the .xls and that is the end of my hardwork. It no longer seems to
work.

Can somebody help explain this behaviour? And ideally help solve this error.

Thanks in anticipation.