We have Access 2000, running on a network, on Windows XP. It used to be a Windows NT 4.0 network, and had the same problem. It is installed in a Public folder, and several users have permissions to use it. But, even though it is set for Default Open Mode of "Shared", only one user can open it at a time.
The error message is "could not lock file. error 3050".
As an experiment, Itried to use the Security Wizard , got a message that says " MS Access can't run the security Wizard because this database is open in exclusive mode". I believe this confirms that the db is in exclusive mode.
I have Full Control permissions, but not Admin priviliges.
Any suggestions greatly appreciated.