Fatal: LoadModule: error loading module 'mod_sql_mysql.c'

I tried to install proftpd in webmin and I broke ftp in zpanel. I got following error message when I run proftpd command.

root@Ubuntu12:~# proftpd

Ubuntu12 proftpd[1400]: Fatal: LoadModule: error loading module 'mod_sql_mysql.c': Operation not permitted on line 38 of '/etc/zpanel/configs/proftpd/proftpd-mysql.conf'

And I searched everywhere but I couldn't find anything. But following command make my error vanish.

 apt-get install proftpd-mod-mysql

If it asked what mode, choose 'stand-alone'.


root@Ubuntu12:~# proftpd

And it must be running.