How to run script/server in a thread?

I have an application in which a server part has been written using
rails, and the client part using firewatir. I would like to fire both
up with a single command. What mistake am I making below? I am
running this from the app root folder, where I am able to fire up irb
and successfully feed it exec(‘script/server’).

Warmly, Arun

#!/usr/bin/env ruby
require ‘rubygems’
#Include the FireWatir file.
require ‘firewatir’
#include the FireWatir Module.
include FireWatir
begin
th=Thread.new{exec(‘script/server’)}
sleep(3) #to give the server time to start. Is there a better way?
ff=Firefox.new
ff.goto(“http://localhost:3000”)
sleep (5)
ensure
ff.close
th.terminate
end


Your error is the use of exec() - exec() overwrites the whole process
(all threads) with the new program. Use the system() instead…

izidor