[Proftpd] failed binding 0.0.0.0
I can't use my proftpd server on my Debian Woody box. It's launched via inetd and when I want to open a ftp session to my server, I have the message :
421 Service not available, remote server has closed connection
So I read the syslog file, and I see :
Nov 24 14:32:31 leon proftpd: leon - Failed binding to 0.0.0.0, port 21: Address already in use
Nov 24 14:32:31 leon proftpd: leon - Check the ServerType directive to ensure you are configured correctly.
I don't know what it means. May be it's a conflict between two versions of proftpd (I've installed it from the sources, and after, I've installed the debian-package because I had already this error message).
Thanks for your help.