I'm trying to login by FTP to my WordPress OneClickInstall droplet, but I can't seem to get the configuration correct. I read multiple tutorials on the subject on DigitalOcean as well as the Ubuntu forums - still it doesn't work. Here is what I have done so far and the results:

1. Installed proftpd (as root)
2. Edited the proftpd.conf file and restarted the service (as mentioned here - except for uncommenting the "DefaultRoot" line)
3. Logged into the droplet as root, created a new user and gave it sudo rights
4. Got the 530-error when trying to login as the new user via FileZilla
5. Commented the default user and group in proftpd.conf as mentioned here http://ubuntuforums.org/showthread.php?t=1104166&p=7517447#post7517447
6. Got the "ECONNREFUSED - Connection refused by server" error
7. The log files either say incorrect password or ProFTPD killed (signal 15)

The password entered seems to be correct (since I copy-paste it).