Invalid binding information

Rails
1

Hello everyone
i am working on a web application where i need to authenticate our
company user’s with our active directory/ldap server.

i am using ruby-net-ldap gem for that purpose and getting the following
error

Net::LDAP::LdapError in LoginController#authenticate
“invalid binding information”

Application Trace

/home/mubashir/.gem/ruby/1.8/gems/ruby-net-ldap-0.0.4/lib/net/ldap.rb:1097:in
bind' /home/mubashir/.gem/ruby/1.8/gems/ruby-net-ldap-0.0.4/lib/net/ldap.rb:701:inbind’
/home/mubashir/mis/lib/ldap_connect.rb:9:in authenticate' /home/mubashir/mis/app/controllers/login_controller.rb:10:inauthenticate’

=====================================================================
Here is the flow of my program
i ve put ldap_connect.rb in my lib folder with the following code

require ‘net/ldap’
module LDAP
def self.authenticate(user, password)
if user == “” || password == “”
return false
end
ldap_con = Net::LDAP.new({:host => ‘203.155.2.3’,
:auth=>{:method=>:simple,:username => user,:password =>
password } } )
return true if ldap_con.bind
return false
end
end

And in my login controller in have put the following method

def authenticate
if session[:person] == LDAP.authenticate(params[:login][:name],
params[:login][:password])
session[:username]=params[:login][:name]
redirect_to :controller => ‘application’
else
flash[:notice] = “Login failed!”
redirect_to :action => “index”
end
end

WOuld any body help me, how i can solve this issue.

Thanks