Issue on Autosum function with Excel 2007

Question

Hi,

I have a problem with the autosum function on Office 2007.

On a sheet with economic data, after changing the sum factors the sum value doesn't get updated. No macros are active and the formula SUM (A1:A8) is correct....

 Even after a "refresh all", nothing changes.

Can you help me please??

Thank you in advance,
regards

Stefano