Thanks for posting!
Are you ever prompted to enter your credentials? If not, you may have the file set to automatically log in using your administrator account. To change this, open the database and head to File -> File Options. Then, uncheck the "Log in using:" option. This will force it to prompt you for the username and password on each launch.
Thanks, I was logging in with the new account but it didn't make any difference until I made the change you suggested.