L-S-08:~# proftpd -n -d 5
- mod_ctrls/0.9.4: binding ctrls socket to '/var/run/proftpd/proftpd.sock'
- parsing '/etc/proftpd/proftpd.conf' configuration
- parsing '/etc/proftpd/modules.conf' configuration
- mod_tls/2.1.1: using OpenSSL 0.9.8c 05 Sep 2006
- disabling runtime support for IPv6 connections
- DenyFilter: compiling deny regex '\*.*/'
- <Directory /*>: deferring resolution of path
- PathDenyFilter: compiling deny regex '.quota$'
- <IfModule>: using 'mod_delay.c' section at line 83
L-S-08 -
L-S-08 - Config for mats.8s.nl:
L-S-08 - Limit
L-S-08 - IgnoreHidden
L-S-08 - /*
L-S-08 - Umask
L-S-08 - DirUmask
L-S-08 - AllowOverwrite
L-S-08 - HideNoAccess
L-S-08 - ShowSymlinks
L-S-08 - AllowStoreRestart
L-S-08 - AllowForeignAddress
L-S-08 - DisplayLogin
L-S-08 - DisplayFirstChdir
L-S-08 - DenyFilter
L-S-08 - SQLAuthTypes
L-S-08 - SQLAuthenticate
L-S-08 - SQLConnectInfo
L-S-08 - SQLMinID
L-S-08 - SQLNamedQuery_get-quota-limit
L-S-08 - SQLNamedQuery_get-quota-tally
L-S-08 - SQLNamedQuery_update-quota-tally
L-S-08 - SQLNamedQuery_insert-quota-tally
L-S-08 - RootLogin
L-S-08 - TransferLog
L-S-08 - PathDenyFilter
L-S-08 - DeferWelcome
L-S-08 - ShowSymlinks
L-S-08 - DefaultServer
L-S-08 - ShowSymlinks
L-S-08 - AllowOverwrite
L-S-08 - IdentLookups
L-S-08 - AllowStoreRestart
L-S-08 - AllowForeignAddress
L-S-08 - TimeoutNoTransfer
L-S-08 - TimeoutStalled
L-S-08 - TimeoutIdle
L-S-08 - DisplayLogin
L-S-08 - DisplayFirstChdir
L-S-08 - DenyFilter
L-S-08 - DefaultRoot
L-S-08 - UserID
L-S-08 - UserName
L-S-08 - GroupID
L-S-08 - GroupName
L-S-08 - DelayEngine
L-S-08 - SQLBackend
L-S-08 - SQLAuthTypes
L-S-08 - SQLAuthenticate
L-S-08 - SQLConnectInfo
L-S-08 - SQLUserTable
L-S-08 - SQLUsernameField
L-S-08 - SQLPasswordField
L-S-08 - SQLUidField
L-S-08 - SQLGidField
L-S-08 - SQLHomedirField
L-S-08 - SQLShellField
L-S-08 - SQLGroupTable
L-S-08 - SQLGroupnameField
L-S-08 - SQLGroupGIDField
L-S-08 - SQLGroupMembersField
L-S-08 - SQLMinID
L-S-08 - QuotaEngine
L-S-08 - QuotaShowQuotas
L-S-08 - QuotaDisplayUnits
L-S-08 - SQLNamedQuery_get-quota-limit
L-S-08 - SQLNamedQuery_get-quota-tally
L-S-08 - SQLNamedQuery_update-quota-tally
L-S-08 - SQLNamedQuery_insert-quota-tally
L-S-08 - QuotaLock
L-S-08 - QuotaLimitTable
L-S-08 - QuotaTallyTable
L-S-08 - RootLogin
L-S-08 - TransferLog
L-S-08 - ExtendedLog
L-S-08 - PathDenyFilter
L-S-08 - mod_ctrls/0.9.4: binding ctrls socket to '/var/run/proftpd/proftpd.sock'
L-S-08 - deleting existing scoreboard '/var/run/proftpd/proftpd.scoreboard'
L-S-08 - Failed binding to 0.0.0.0, port 21: Address already in use
L-S-08 - Check the ServerType directive to ensure you are configured correctly.

I had a smimilar issue, but cant remeber what i did XD

but could you please post
netstat -tulpen | grep :21
?

hm, another idea:
Please check your /etc/inetd.conf there should be no ftp entry if your proftpd is running in standalone mode

(if ServerType = standalone)