Problems with ftp

[Krisxxx]

This is what i get:
server5:~# proftpd -nd6
- mod_tls/2.1.2: using OpenSSL 0.9.8g 19 Oct 2007
- DenyFilter: compiling deny regex '\*.*/'
- <IfModule>: using 'mod_dynmasq.c' section at line 54
- <IfModule>: using 'mod_quotatab.c' section at line 91
- <IfModule>: skipping 'mod_ratio.c' section at line 95
- <IfModule>: using 'mod_delay.c' section at line 103
- <IfModule>: using 'mod_ctrls.c' section at line 107
- <IfModule>: using 'mod_ctrls_admin.c' section at line 115
server5.whitestar.dk -
server5.whitestar.dk - Config for Debian:
server5.whitestar.dk - IdentLookups
server5.whitestar.dk - DeferWelcome
server5.whitestar.dk - DefaultServer
server5.whitestar.dk - ShowSymlinks
server5.whitestar.dk - TimeoutNoTransfer
server5.whitestar.dk - TimeoutStalled
server5.whitestar.dk - TimeoutIdle
server5.whitestar.dk - DisplayLogin
server5.whitestar.dk - DisplayChdir
server5.whitestar.dk - ListOptions
server5.whitestar.dk - DenyFilter
server5.whitestar.dk - UserID
server5.whitestar.dk - UserName
server5.whitestar.dk - GroupID
server5.whitestar.dk - GroupName
server5.whitestar.dk - Umask
server5.whitestar.dk - DirUmask
server5.whitestar.dk - AllowOverwrite
server5.whitestar.dk - TransferLog
server5.whitestar.dk - QuotaEngine
server5.whitestar.dk - DelayEngine
server5.whitestar.dk - mod_lang/0.8: binding to text domain 'proftpd' using locale path '/usr/share/locale'
server5.whitestar.dk - deleting existing scoreboard '/var/run/proftpd/proftpd.scoreboard'
server5.whitestar.dk - Failed binding to ::, port 21: Adressen er allerede i brug
server5.whitestar.dk - Check the ServerType directive to ensure you are configured correctly.

What could the problem be?