[RCU] Connection to storage server failed

My one active Roundcubemail user started getting this message recently and of course cannot access his mail. So I googled it and landed at:

http://help.directadmin.com/item.php?id=473

I did the process of deleting his dovecot files. My directory layout is different, everything is under /home/vmail/doman/user/

Still cannot log in, and now no dovecot files (btw, I tested this with one of my accounts that uses Thunderbird for imap connections and new dovecot files were built).

I read on down the suggestions, but am not finding anything. I can't really tell about the password problem, as I use mysql for the password.

Any suggestions of how to fix this?