problemas com freeradius e mysql

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Tenho andado a tentar instalar o freeradius com mysql e tenho-me deparado
com o seguinte problema:
Depois de alterar o radiusd.conf em conformidade com vários artigos
encontrados na net,tento arancar o radius
root  ubuntu:/usr/local/sbin# radiusd -x
e dá-me sempre o mesmo erro
...
...
...
...
...
...
Starting - reading configuration files ...
Using deprecated naslist file.  Support for this will go away soon.
Module: Loaded exec
rlm_exec: Wait=yes but no output defined. Did you mean output=none?
Module: Instantiated exec (exec)
Module: Loaded expr
Module: Instantiated expr (expr)
Module: Loaded PAP
Module: Instantiated pap (pap)
Module: Loaded CHAP
Module: Instantiated chap (chap)
Module: Loaded MS-CHAP
Module: Instantiated mschap (mschap)
Module: Loaded eap
rlm_eap: Loaded and initialized type md5
rlm_eap: Loaded and initialized type leap
rlm_eap: Loaded and initialized type gtc
rlm_eap: Loaded and initialized type mschapv2
Module: Instantiated eap (eap)
Module: Loaded preprocess
Module: Instantiated preprocess (preprocess)
Module: Loaded realm
Module: Instantiated realm (suffix)
Module: Loaded SQL
Falha de segmentação

será que alguem me pode ajudar?
julio