Error reading directory - CZ Lang/Locales

We have a problem with users, having CZ local variable set on the server. When try to login WinSCP,
Error listing directory is displayed and operation is aborted. Thanks for help. Dr.Kocna
kocna@mbox.cesnet.cz

WinSCP requires english environment for SCP, see Requirements. With SFTP you should not have a problems.