how to automate telnet thro' expect cmd

From: karthikeyan (thegreatkarthik_at_yahoo.co.in)
Date: 07/31/03 

Date: 31 Jul 2003 05:31:27 -0700

sir,
 I want to automate my telnet connection(instead of typing
repeated username & password)
I suppose i can write expect script

#!/usr/bin/expect

eval spawn telnet ip
set timeout 20
expect login:
send "username\r"
expect password:
send "password\r"
sleep 2
interact

when i 'm running sh scriptname i 'm getting the error "command
spawn not found"
i removed the spawn
even the system says

 telnet hostname
login:
(but it didn't proceeds with username & passwd which i send in the
script
help me

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