请帮忙分析一下SAMBA日志

[2010/09/13 14:18:16, 1] smbd/service.c:make_connection_snum(648)
joi (192.168.1.99) connect to service test initially as user TEST/joi (uid=16892, gid=17000) (pid 16117)
[2010/09/13 14:18:17, 1] smbd/sesssetup.c:reply_spnego_kerberos(250)
Username TEST/JOI$ is invalid on this system

请赐教！谢谢！