Problem while saving a shared excel'07 document - cannot track cha
 

Hi, in my bussiness, we have a shared excel 2007 document.
This document worked fine with Excel 2003, but now we're migrated to 2007,
we've got all kind of problems..

When I try to save the document, 6 out of 10 times, the saving failed with
an error that Excel could not track changes. You should close the document
and try it again, but then you loose all you're changes. You can also turn
'Share Workbook' off, and on again, then you can save the file, but all the
changes other people have made are gone...

I can't find any solution, so maybe there's someone here who can help?

Thnx!