Net::LDAP::LdapError: no connection to server

[Gustaf Lindqvist]

Trying to establish a connection from a module in Rails and get no
connection to server. I have tested the same code outside Rails and it
works fine.

#!/usr/bin/ruby -w
require 'rubygems'
require 'net-ldap'

module Foo
module Bar
class User

attr_reader :ldap_connection

def initialize
@@ldap = Net::LDAP.new(:host => "<ip-number>", :port => 389)
@@treebase = "ou=People, dc=foo, dc=bar"
username = "cn=Manager"
password = "password"
@@ldap.auth username, password

begin
if @@ldap.bind
@ldap_connection = true
else
@ldap_connection = false
end
rescue Net::LDAP::LdapError
@ldap_connection = false
end
end
end
end
end

Any ideas why this is failing in Rails. Does net-ldap do any dns lookup
that might get wrong inside Rails stack?