[FreeNX-kNX] Authentication failed with unicode characters

[Aron]

User "españa" is trying to connect, but it always says "Authentication failed" 
and in server log appears this (yes, there is a question inside espa�a):

-- NX SERVER START:  - ORIG_COMMAND=
HELLO NXSERVER - Version 3.2.0-74-SVN OS (GPL, using backend: 3.3.0)
NX> 105 hello NXCLIENT - Version 3.2.0
NX> 134 Accepted protocol: 3.2.0
NX> 105 SET SHELL_MODE SHELL
NX> 105 SET AUTH_MODE PASSWORD
NX> 105 login
NX> 101 User: espa�a
NX> 102 Password:
Info: Auth method: ssh
NX> 404 ERROR: wrong password or login
NX> 999 Bye

--