Telnet from connection sharing

i have 2 win 98 machine. on my first machine i have connected modem & am dialing to internet.
i have enabled internet connection sharing in WIN 98. because of this am able to browse from my second machine. but am not able to use telnet from my second machine.

how do i perform telnet on such connnection sharing ?
if this is not possible in win 98 , can we do it on win 2k proffessional ??