From: DeskNow Knowledge Base
http://www.desknow.com/kb/

I can't upload files with east asian characters in the name
http://www.desknow.com/kb/idx/10/016/article/

DeskNow stores files directly onto the underlying operating systems. Make sure that the OS of your DeskNow server supports east-asian characters in the filename.

For instance, RedHat Linux before 9.0 did not support east asian characters.