Unable to start proftpd server debian 8

I'm trying to configure an FTP server on debian 8. I'm using the basic conf file of proftpd, found [here](http://www.proftpd.org/docs/configs/basic.conf) Now when I try to start the server I get this error:

[....]
 Starting proftpd (via systemctl): proftpd.serviceJob for proftpd.service failed. See 'systemctl status proftpd.service' and 'journalctl -xn' for details.
 failed!

logs:

juin 04 10:47:52 client1 proftpd: Starting ftp server: proftpd2015-06-04 10:47:52,978 client1 proftpd: fatal: unknown configuration directive 'DisplayF
juin 04 10:47:52 client1 proftpd: failed!
juin 04 10:47:52 client1 systemd: proftpd.service: control process exited, code=exited status=1
juin 04 10:47:52 client1 systemd: Failed to start LSB: Starts ProFTPD daemon.
-- Subject: L'unité (unit) proftpd.service a échoué
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel 
-- L'unité (unit) proftpd.service a échoué, avec le résultat failed.
juin 04 10:47:53 client1 systemd: Unit proftpd.service entered failed state.

Any idea about the problem?