(usagi-users 03460) telnet "Connection refused"

Hi,

I'm a IPv6 newbie and need to use telnet in my environment, using 2.4.20 kernel.
(Please don tell me to use latest kernel, or to use ssh ;)

Anyway I've configured and vefified the connection with ping6,
traceroute6, and ssh (openssh).
It seems no problem at all.
But I can't use only telnet in IPv6.

----
# telnet 3ffe:5ff:100:aa01::2
Trying 3ffe:5ff:100:aa01::2...
telnet: Unable to connect to remote host: Connection refused
#

I suspected telnet & in.telnetd wasn't ipv6 enabled (It's from netkit-0.17),
so I built telnet/in.telnetd from USAGI stable-20030214 and interchanged them.
But it comes the same result.

Of cource I can use telnet in v4.
Am I missing any other setting?

Thanks.

Tadashi