Under Tools Option check the Calculation settings..
Set that to automatic if not
--
If this post helps click Yes
---------------
Jacob Skaria
"Formulas not responding to changed data" wrote:
> All of a sudden, worksheets with formulas that I have been using forever are
> not responding to changes in data. I checked formulas and formatting - all is
> correct. The cell with the formula in it does not show a changed result when
> the related data changes.....Seems suddenly to have happened to all my
> spreadsheets!