The DiskLock Desk Accessory has been corrupted, perhaps by a virus or a disk crash. Please install a new copy of the DiskLock Desk Accessory using the Font/DA Mover.
The DiskLock INIT (startup file) was not in the system folder when you started your Mac. Use the DiskLock Installer to install DiskLock.
A different version of DiskLock is installed on your disk. Did you remember to update the desk accessory when you updated DiskLock?
This was locked with DES encryption. This version of DiskLock does not support DES encryption.
This version of the DiskLock DA has expired. You will no longer be able to lock files or folders. To unlock locked files or folders, double-click on the locked item. The FolderLock application will unlock them.
You cannot lock a shared folder, or a folder which contains a shared folder.