Ftp connection problem after update

Hi everyone, everything was working normal but after kernel update, proftpd problem started

When i tried to start proftpd service, it gave this error

unable to load 'mod_sql_mysql.c'; check to see if '/usr/libexec/proftpd/mod_sql_mysql.la' exists

After that i deleted the 

LoadModule mod_sql_mysql.c

line from /etc/proftpd.conf and proftpd service started to work but when i tried ftp connection, error was server not accepted

then changed the name of proftpd.conf and i did yum reinstall proftpd and yum reinstall proftpd-mysql

after that proftpd service can start normally but when i try to ftp connection, ftp client gives 530 login incorrect and proftpd service gives ftp session opened, no such user error

Can't open PID file /run/proftpd/proftpd.pid (yet?) after start: No such file or directory
ProFTPD 1.3.5e (maint) standalone mode STARTUP
Started ProFTPD FTP Server.


I can reach sentora_proftpd database and can see the users, i can add ftp users from sentora panel

Centos 7.0 Sentora 1.0.3

How can i solve this problem?