I didn't ask about their rights on the mdb file: I asked about their rights
on the folder where the mdb file exists.
When the first person opens the mdb file, Access wants to create a locking
file (.ldb) in that same folder. Subsequent users update the locking file
when they connect. When the last person closes the mdb file, Access wants to
delete the locking file.
Of course, without knowing what your Adminstrator button does, it's
difficult to give any other advice.
Doug Steele, Microsoft Access MVP
(no private e-mails, please)