installing backgroundrb

Hi,

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 http://svn.devjavu.com/backgroundrb/tags/release-0.2.1 backgroundrb

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, Rajmohan