Office 2003 template problems

Hi
I have an installation of Office 2003 (ver. 11).
When i try to use an old template (frequently used by all users) and it says that i have the wrong office version
(Office 2003 ver.11.4920.4920), if i open the same template on a machine with Office XP or 2000 i dont have any problems.
Anyone that knows why i get this problem in the latest Office release, BETA release i would add.
ANY suggestions is welcome.