How to configure pure-ftpd to support russian chars


I need some help with configuring Pure-FTPD on my Drobo FS. I successfully installed Drobo Admin Utility, Dropbear and Pure-FTPD. Everything works well, I am able to access my Shared folders remotely via ftp, but folders and files that have Russian chars are not shown properly. From the Pure-FTPD documentation, I see that it is supposed to support many languages, but It is not clear how I can configure it without compiling the Pure-ftpd server.

Is there any configuration file where on the Drobo where I can set the appropriate settings or any other narrow way to fix it?

Thank you.