Here's the deal. Access 2000, 2002, 2003 implement locking of Forms
when more than one user has the Form open. Access 97 didn't care and
often it wasn't a problem.

Thus, in your case, each person needs to have their own Front End file
- the one that contains Forms, Reports, Querys, Macros, Modules, local
private tables.

If you don't want to implement a separate file for each person, then
just tell people to ignore the error message - they will be able to do
data entry, editing but no one will be adble to do Form, Query,
Macros, Modules, Report design unless everyone except one closes the file.

HTH
Ananda