Server has no response

[openbsd shen]

After I install freeradius 1.1.0, and I have not changed radiusd.conf,
I start freeradius:

./radiusd -X

it shows:
Module: Instantiated detail (detail)
Module: Loaded radutmp
 radutmp: filename = "/usr/local/freeradius/var/log/radius/radutmp"
 radutmp: username = "%{User-Name}"
 radutmp: case_sensitive = yes
 radutmp: check_with_nas = yes
 radutmp: perm = 384
 radutmp: callerid = yes
Module: Instantiated radutmp (radutmp)
Listening on authentication *:1812
Listening on accounting *:1813
Ready to process requests.

Then I use the command to test:
  ./radtest test teset localhost 0 testing123

It shows:
Sending Access-Request of id 71 to 127.0.0.1 port 1812
        User-Name = "test"
        User-Password = "teset"
        NAS-IP-Address = 255.255.255.255
        NAS-Port = 0
Re-sending Access-Request of id 71 to 127.0.0.1 port 1812
        User-Name = "test"
        User-Password = "teset"
        NAS-IP-Address = 255.255.255.255
        NAS-Port = 0
........
radclient: no response from server for ID 65


and the server has not any response.

I don't know why?