Telnet problem in Windows 2000

Just disable NTLM authentication:

Open the Telnet Server Administration tool > Display / change registry settings (this is usually number 3) > NTLM (usually number 7)

Then it will say:

Current value of NTLM = 2
Do you want to change this value ? [y/n]y
NTLM [ current value = 2; acceptable values 0, 1 or 2 ] :

Use 0

Then restart telnet.

I'm using telnet from command line. will you give me more details on "How to open Telnet Server Administration tool"

It's in Administrative Tools > Services

In windows.

I'm sorry but I didn't find it. You said:
"Then it will say:

Current value of NTLM = 2
Do you want to change this value ? [y/n]y
NTLM [ current value = 2; acceptable values 0, 1 or 2 ] :

Use 0 "

I couldn't find these settings in telnet service properties.
sorry

Hmm, those instructions should work if you are running a, non-Microsoft telnet client.

I don't think I'll be able to help if that's not it you as I disable all telnet services on any computer I use.