Installing backgroundrb


I am having issues with installing the backgroundrb plugin. I am using
cygwin on WinXP. I downloaded the backgroundrb using the following cmd

cd ~/
rails myapp
cd myapp
svn co

Now when i type ‘rake background:setup’, I get the following error

$ rake background:setup
(in /cygdrive/d/Profiles/localuser/start)
rake aborted!
Don’t know how to build task ‘background:setup’

(See full trace by running task with --trace)

What am I missing?

Thanks in advance,