There is a problem with the SMB protocol in the Windows 2000 operating system that can cause problems with data corruption if it is being used as a file server, such as would be the case if storing a shared DBISAM database in such a location. Please use the following link to find out more details on the problem:

http://support.microsoft.com/default.aspx?scid=kb;en-us;Q307982

Microsoft has provided a hotfix for the problem that you should download if needed.