How do I stop Excel 2000 from saving file history from file that .
 

I have I workbook that used to be shared. I have unshared it, however, it's
still saving the history files. I've tried sharing the workbook again, going
to the advanced tab and telling it not to save the history, saving it again,
going in, unsharing it, but it still keeps saving the history files. How do
I stop it?

Any help would be appreciated. Thanks in advance.