[FreeNX-kNX] Freenx and nxclient (windows)

[ctof]

hello,

i try to used freenx (nxserver on a debian install)
and i try to use nxclient (from nomachine) on a windows XP
i'have an error on the client side:
    NX> 203 NXSSH running with pid: 1344
    NX> 200 Connected to address: 192.168.0.200 on port: 22
    NX> 202 Authenticating user: nx
    NX> 208 Using auth method: publickey
    NX> 204 Authentication failed.

i'm not sure to understand the mecanisme of authentification.
on the server i have an account created by the debian package 
(/home/.nx/....)

any help is welcome
regards
Christophe