Check the Calculation mode to ensure that it is automatic. From the Tools
menu, choose Options and in that dialog the Calculation tab. Make sure it is
set to Automatic.


--
Cordially,
Chip Pearson
Microsoft MVP - Excel, 10 Years
Pearson Software Consulting
www.cpearson.com
(email on the web site)


"kvonwald" wrote in message
...
Hi,
I have several Excel Spreadsheets, that no longer represent the formulas.
When sheet was created, formula''s worked, now when I open the
spreadsheet,
the forumulas ignore new data input and formula results do not change.
Very
odd.

Does anyone know how to fix this problem?

Thanks for your help!