FMS 2.0.4: shared objects backup problem

Hello,
I try to use some directory as backup folder for fms applications shared objects:
(Application.xml)
...
<DuplicateDir appName="true">C:\fms\backupSharedObjects</DuplicateDir>
...

Directory exists, and there are subfolders created according to my applications names. It's ok.
But when FMS tries to backup shared object, I receive the following messages in log:
Failed to flush shared object (C:\fms\backupSharedObjects\someapp\_definst_\someSO.fso).

I have FMS installed on Windows Server 2003 sp2 and also on Windows Vista sp1.
FMS service has full system control (read/write) on both OS.
And on both I see error message: Failed to flush shared object...

Could you help me, please?

Thanks,
Artem.