backgrounDRB & Cygwin?

I'm trying to use BackgrounDRB on InstantRails v1.7 (Ruby 1.8.6 and
Rails 2.1.0) with Windows Server 2003. I know that I can't use
BackgrounDRB on a Windows machine because it uses forking - thats why I
installed Cygwin. However, when I attempt to start backgrounDRB, it
tells me it is still missing Fork. I just used the GUI installer to
install Cygwin... Any ideas as to why this isn't working?

Any and all help is appreciated!

- Jeff Miller