[Zope] FTP and acquisition problem - bug in FTP server?

Hi all, I have [standard bulk of Zope 2.5.1 on Win32] problem with file update, delete or create (and directory deleting/creating too) If file/folder-names in traverse are identical, like that: folder1 folder1 * file1 folder1 * file1 * All objects marked with "*" has these problems.

From ZMI I have no problems with that names.

Regards J. Lukesh