Hi
Maybe, because the version of excel which has been used to create this file, is a prior version of excel then I think, you should try to create a association of files.
Then copy this file on Windows Office, click right, choose "Open with...", select the program "Excel 2007", check the box "Always use this program to open this type of file" (or something like that) and click "OK".
Normaly, after you should be able to open them directly.
Bye
"Pour trouver une solution � ses probl�mes, il faut s'en donner la peine."