Subdomain Redirect error

Hi

I got error while I try this:

My controller is :

class SessionsController < Devise::SessionsController   def new     super   end   def create     resource = warden.authenticate!(:scope => resource_name, :recall => :failure)     if resource       subdomain_name = current_user.account.subdomain_name       puts "==================#{subdomain_name}"       redirect_to root_url(:subdomain => subdomain_name)

    end   end

end

and when I try to redirect I have got

http://kausik.localhost:3000:3000/ in rails console

where it should be http://kausik.localhost:3000/

Please help to fix this

Thanks in Advance

Kausik