Module 3 milestone 2 ftp connection not established

Has anyone solved the problem yet? I took all the steps, but still unable to solve the issue.

The conf variables are:
run_as_launching_user=YES
local_enable=YES
write_enable=YES
local_umask=022
anon_upload_enable=YES
anon_mkdir_write_enable=YES
dirmessage_enable=YES
xferlog_enable=YES
connect_from_port_20=YES
chown_uploads=YES
listen_port=8081
vsftpd_log_file=/home/crio-user/workspace/vsftpd.log
xferlog_std_format=NO
syslog_enable=NO
log_ftp_protocol=YES
ftp_username=nobody
listen=YES

Please help. It has been more than two days solving the issue.

Are u using the root password?

I am using the password which is given with QBox.
I do not remember the root password. Maybe I haven’t even set that.

Refer : 421 Service not available, remote server has closed connection