Sharing Database over a shared network folder

Hello. Recently my agency has upgraded it's server. In doing so, my database was "unshared" somehow within the new public folder. I can access, update, and use the database and it's currently in a shared, public folder, but other users with access to this folder cannot see the information I've input, and vice versa. When my administrative assistant adds a new participant, for example to the database, I cannot see what she's added. Are there any suggestions as to what settings I should be checking?

Any and all suggestions appreciated.

Thanks. :D