RHEL5: vsftpd ... 530 Permission denied.

[firas.kassim]

Dear all,
I have installed RHE 5, when I try to login as ftp, the follow statement appear:
[root@nsn-server vsftpd]# ftp localhost
Connected to nsn-server.
220 (vsFTPd 2.0.5)
530 Please login with USER and PASS.
530 Please login with USER and PASS.
KERBEROS_V4 rejected as an authentication type
Name (localhost:nsn): nsn
530 Permission denied.
Login failed.
ftp>

for more information please find below output commands:

[root@nsn-server vsftpd]# grep ftpupload /etc/passwd
[root@nsn-server vsftpd]#


[root@nsn-server vsftpd]# grep -vE "^#" /etc/vsftpd/*
/etc/vsftpd/ftpusers:root
/etc/vsftpd/ftpusers:bin
/etc/vsftpd/ftpusers:daemon
/etc/vsftpd/ftpusers:adm
/etc/vsftpd/ftpusers:lp
/etc/vsftpd/ftpusers:sync
/etc/vsftpd/ftpusers:shutdown
/etc/vsftpd/ftpusers:halt
/etc/vsftpd/ftpusers:mail
/etc/vsftpd/ftpusers:news
/etc/vsftpd/ftpusers:uucp
/etc/vsftpd/ftpusers:operator
/etc/vsftpd/ftpusers:games
/etc/vsftpd/ftpusers:nobody
/etc/vsftpd/ftpusers:
/etc/vsftpd/user_list:root
/etc/vsftpd/user_list:bin
/etc/vsftpd/user_list:daemon
/etc/vsftpd/user_list:adm
/etc/vsftpd/user_list:lp
/etc/vsftpd/user_list:sync
/etc/vsftpd/user_list:shutdown
/etc/vsftpd/user_list:halt
/etc/vsftpd/user_list:mail
/etc/vsftpd/user_list:news
/etc/vsftpd/user_list:uucp
/etc/vsftpd/user_list:operator
/etc/vsftpd/user_list:games
/etc/vsftpd/user_list:nobody
/etc/vsftpd/user_list:nsn
/etc/vsftpd/user_list:
/etc/vsftpd/vsftpd.conf:anonymous_enable=YES
/etc/vsftpd/vsftpd.conf:local_enable=YES
/etc/vsftpd/vsftpd.conf:write_enable=YES
/etc/vsftpd/vsftpd.conf:local_umask=022
/etc/vsftpd/vsftpd.conf:dirmessage_enable=YES
/etc/vsftpd/vsftpd.confferlog_enable=YES
/etc/vsftpd/vsftpd.conf:connect_from_port_20=YES
/etc/vsftpd/vsftpd.confferlog_std_format=YES
/etc/vsftpd/vsftpd.conf:listen=YES
/etc/vsftpd/vsftpd.conf:
/etc/vsftpd/vsftpd.confam_service_name=vsftpd
/etc/vsftpd/vsftpd.conf:userlist_enable=YES
/etc/vsftpd/vsftpd.conf:tcp_wrappers=YES
/etc/vsftpd/vsftpd_conf_migrate.sh:PREFIX="vsftpd"
/etc/vsftpd/vsftpd_conf_migrate.sh:for file in $( ls /etc/${PREFIX}.* ); do
/etc/vsftpd/vsftpd_conf_migrate.sh: if [ ! -L $file ]; then
/etc/vsftpd/vsftpd_conf_migrate.sh: new=`echo $file | sed s/${PREFIX}\./${PREFIX}\\\\//g | sed s/\.rpmsave//g`
/etc/vsftpd/vsftpd_conf_migrate.sh: mv -f ${file} ${new}
/etc/vsftpd/vsftpd_conf_migrate.sh: ln -s ${new} ${file}
/etc/vsftpd/vsftpd_conf_migrate.sh: echo $file moved to $new
/etc/vsftpd/vsftpd_conf_migrate.sh: fi
/etc/vsftpd/vsftpd_conf_migrate.sh:done
/etc/vsftpd/vsftpd.conf.old:anonymous_enable=YES
/etc/vsftpd/vsftpd.conf.old:local_enable=YES
/etc/vsftpd/vsftpd.conf.old:write_enable=YES
/etc/vsftpd/vsftpd.conf.old:local_umask=022
/etc/vsftpd/vsftpd.conf.old:dirmessage_enable=YES
/etc/vsftpd/vsftpd.conf.oldferlog_enable=YES
/etc/vsftpd/vsftpd.conf.old:connect_from_port_20=YES
/etc/vsftpd/vsftpd.conf.oldferlog_std_format=YES
/etc/vsftpd/vsftpd.conf.old:listen=YES
/etc/vsftpd/vsftpd.conf.old:
/etc/vsftpd/vsftpd.conf.oldam_service_name=vsftpd
/etc/vsftpd/vsftpd.conf.old:userlist_enable=YES
/etc/vsftpd/vsftpd.conf.old:tcp_wrappers=YES
[root@nsn-server vsftpd]#

Please help me, and many thanks in advance.

With regards,
Firas