Optware install troubles.

Hello.

I am using this guide to install Transmition, WNR3500L v1 with USB HB following this guide:

http://www.luminaria.cc/en/dd-wrt-home-server-part-2-bittorrent-client-a...

but running into problems

DD-WRT v24-sp2 std (c) 2012 NewMedia-NET GmbH
Release: 03/16/12 (SVN revision: 18730M)

King-Kong login: root
Password:

#===========================================================#
#                      DD-WRT V24-K26                       #
#                        Kong Mod                           #
#===========================================================#

BusyBox v1.19.4 (2012-03-16 21:56:48 CET) built-in shell (ash)
Enter 'help' for a list of built-in commands.

root@King-Kong:~# wget http://www.3iii.dk/linux/optware/optware-install-ddwrt.sh
 -O /tmp/optware-install.sh
root@King-Kong:~# sh /tmp/optware-install.sh
sh: can't open '/tmp/optware-install.sh'
root@King-Kong:~#