Errors logging into FTP using virtual users

I setup virtual users on my Ubuntu server and had login errors trying to login. I repeated the steps like a zillion times to see the same login error.

331 Password required for somevirtualuser
Password: 
530 Login incorrect.
ftp: Login failed

Finally, I tried to see the services running using:

sudo netstat -ltp | grep ftp

and, saw a proftpd process running.

rizwan@dragonstone:~$ sudo netstat -ltp|grep ftp
tcp6       0      0 [::]:ftp                [::]:*                  LISTEN      27137/proftpd: (acc

Lesson: Always check processes running before tampering with config files.

This is more like a noob tip than a pro tip