i can't stop freeradius

[Ayşe GİR]

(i love freeradius but i don't lovefreeradius on ubuntu ...)
i install freeradius on ubuntu 9.4 but i can't stop freeradius...
what can i do ?
my console out

root at blacky:/etc/init.d# freeradius stop
root at blacky:/etc/init.d# ps -aux | grep freeradius
Warning: bad ps syntax, perhaps a bogus '-'? See
http://procps.sf.net/faq.html
root      5193  0.0  0.0 106828  2556 ?        Ssl  Jun19   0:00 freeradius
root     16823  0.0  0.0   7524   892 pts/2    R+   14:13   0:00 grep
freeradius
root at blacky:/etc/init.d#

 ( i use freeradius on centos everything is ok but on ubuntu everything is
bad. :( )
i'm sorry for my bad english :)
thank you for everything....
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