I wanted to set up a small ftp on my router (ASUS WL-500gx).
So I added the user ftp by hand, gave it a password and added it to the ftp group...
But now every time I want to log in, vsftp gives me this error:

220 (vsFTPd 2.0.4)

USER ftp

530 This FTP server does not allow anonymous logins.

Although this user exists.

How can I fix this?

Thanks
zapt

BTW: This is the (default) vsftpd.conf:

background=YES
listen=YES
anonymous_enable=NO
local_enable=YES
write_enable=YES
local_umask=022
check_shell=NO
#dirmessage_enable=YES
#ftpd_banner=Welcome to Basti's FTP service.
session_support=NO
#syslog_enable=YES
#userlist_enable=YES
#userlist_deny=NO
#userlist_file=/etc/vsftpd.users
#xferlog_enable=YES
#xferlog_file=/var/log/vsftpd.log
#xferlog_std_format=YES