Debian + Plesk + Proftpd Fails

[cappytoi]

My Plesk version is 8.2 and i use debian 3.1, I check the instructions on

KB #1025 - FTP service doesn't work on my Debian system with Plesk installed.

this faq, it seems added in both inetd configuration file and xinetd.d configuration file in my configuration, also xinetd is working through system but ftp cannot be connectable. It gives "Unable to login server" from remote client and i also check with command line ftp client and service says that "421 Service not available, remote server has closed connection"

I also check this

KB #175 - I'm not able to login to the server via FTP. How do I determine the problem and fix it?

faq and port is open:

Starting nmap 3.81 ( Nmap - Free Security Scanner For Network Exploration & Security Audits. ) at 2007-08-02 16:59 CEST
Interesting ports on xx-server.xxxxxx.net (xxx.xxx.xxx.xxx):
PORT STATE SERVICE
21/tcp open ftp

Nmap finished: 1 IP address (1 host up) scanned in 0.013 seconds

Is there anyone knows how could I solve this situation?

thank you.

 

[cappytoi]

Fixed the problem, scoreboard files directory /var/run/proftpd hasnt been set. I set the folder then it is working.