FreehandMX files corrupting


We seem to have a very odd problem with the FreehandMX files, for some reason, FreehandMX files are corrupting, the actual error is: 'This is not a vlid Freehand file'. The user created a file earlier this morning, closed the file, then when she tried to open the file, the error was returned.

The files are held on a Windows2003 file server, the Mac is running OSX version 10.2.8, Freehand Version 11.0

There does not seem to be anything on the Macromedia site regarding saving issues on Server 2003. This only seems to happen with FreehandMX files.

Any help greatly appreciated as the user is not happy about having to keep re-creating work.