Ruby script/server -- Errno::EADDRINUSE

i am trying to start the server i am getting the following error…

=> Booting WEBrick…
=> Rails application started on http://0.0.0.0:3000
=> Ctrl-C to shutdown server; call with --help for options
[2007-04-17 16:02:20] INFO WEBrick 1.3.1
[2007-04-17 16:02:20] INFO ruby 1.8.6 (2007-03-13) [i686-linux]
[2007-04-17 16:02:20] WARN TCPServer Error: Address already in use -
bind(2)
/usr/local/lib/ruby/1.8/webrick/utils.rb:73:in initialize': Address already in use - bind(2) (Errno::EADDRINUSE) from /usr/local/lib/ruby/1.8/webrick/utils.rb:73:in new’
from /usr/local/lib/ruby/1.8/webrick/utils.rb:73:in
create_listeners' from /usr/local/lib/ruby/1.8/webrick/utils.rb:70:in each’
from /usr/local/lib/ruby/1.8/webrick/utils.rb:70:in
create_listeners' from /usr/local/lib/ruby/1.8/webrick/server.rb:75:in listen’
from /usr/local/lib/ruby/1.8/webrick/server.rb:63:in
initialize' from /usr/local/lib/ruby/1.8/webrick/httpserver.rb:24:in initialize’
from
/usr/local/lib/ruby/gems/1.8/gems/rails-1.2.3/lib/webrick_server.rb:58:in
new' ... 7 levels... from /usr/local/lib/ruby/gems/1.8/gems/rails-1.2.3/lib/commands/server.rb:39 from /usr/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27:in gem_original_require’
from
/usr/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27:in
`require’
from script/server:3

Thanks