Amir, good to see nice people on the internet. Thank you sir.
I fixed my problem with Ajenti MySQL plugin: upgraded all the debian distributions on the server.
Anyways plugins uninstall/reinstall functions on Ajenti might be still not that bad idea.

Hey good guy Amir, i almost think i know that my security is not one of best in the whole world. But thank you for what you've done. I have to disabled ssl because i can't afford it, the "untrusted server/website" warning keeps poping out on chrome browser. (don't know anything about other)
I disabled authentication, 'cause i done alot of things with ajenti, tried to be more familiar with the system.
I noticed that i'm sending you picture with my temporary server's adress before i've done that. Yeah i offered it just to play with it, nothing much serious.
I'm little bit tired right now, going to play around with Ajenti more and if i have time - i'll post what i have found wrong (small bugs, errors mistakes)

BTW. That be great if there was clear guide on how to setup webserver, subdomains, FTP service. Sorry for offtopic.

I'm trying to install "MySQL" plugin. I have done it sucessfully i guess, but error keeps poping out:
ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (2)
So i thinked reinstall might help. Maybe i done mistake while setting the password for mysql.
Have no idea about sockets.

oh it's just a bug, already reported by other user.