I created a file with a macro under the Sheet_Change event that unprotects
and protect back a sheet after different options, it wors fine in 2003 but
when i open the file in Excel 2007, the behaviour is erratic. Is there any
uncopability between 2003 and 2007?

I read an articule on the impct of the antvirus but I don't thinks it is the
case here.

Thanks in advance