Access 2003 (and 2002) use Access 2000 format by default, to avoid causing
problems for people who need to share databases with others who are still
using the older version. You can convert an existing database to the new
format (Tools, Database Utilities, Convert Database) and, if you do not need
to share databases with Access 2000 users, you can change the default for
new databases (Tools, Options, Advanced, Default File Format).