Telnet still error

[tran vanle]

I use kernel 2.6.11.7 and Ramdisk in ELDK 4.0 (I only edit Ramdisk of ELDK 4.0 for login (use ttyCPM0) ).
   - If I run  telnetd(of busybox) daemon  in /sbin/telnetd
        when I telnet to this board ,i receive
        telnetd: bind: Address already in use 
   - If I run  telnetd daemon  in /usr/sbin/in.telnetd 
        when I telnet to this board ,i receive
        telnetd: All network ports in use!
I receive reply mail of  "Kalle Pokki" <kalle.pokki at iki.fi>

>I vaguely remember trying the same thing with a MPC860 target and
>having the same error messages. If I remember it right, the message
>was caused by missing PAM libraries or something like that. I can't
>give you any specific instructions, but you might want to google for
>PAM and telnet to get some more directions.


and I configured PAM as the following:(base on )
/etc/pam.d/telnet

auth       requisite  pam_securetty.so
auth       required   pam_unix.so
account    required   pam_unix.so
password   required   pam_unix.so md5
session    required   pam_unix.so


but still receive the same

What cause this error ?
Thanks a lot    


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