The first thing to check is Excel's international settings. Go to
the Tools menu, choose Options, then the International tab.
There, ensure that the settings are correct. If that doesn't
work, go to the Windows Start menu, choose Control Panel, the
Regional settings. Ensure the settings there are correct.
--
Cordially,
Chip Pearson
Microsoft MVP - Excel
Pearson Software Consulting, LLC
www.cpearson.com