proftpd won't work

 check your config with this command

 proftpd -t6

Checking syntax of configuration file
tera proftpd[20184]: warning: unable to determine IP address of 'server-nam'
tera proftpd[20184]: error: no valid servers configured
tera proftpd[20184]: Fatal: error processing configuration file '/etc/proftpd/proftpd.conf'


i have to add the server name to etc/hosts file