diff --git a/app/controllers/application_controller.rb b/app/controllers/application_controller.rb
index b095718..89bf732 100644
--- a/app/controllers/application_controller.rb
+++ b/app/controllers/application_controller.rb
@@ -27,7 +27,7 @@ class ApplicationController < ActionController::Base
       
       @current_suser ||= StudentUser.find_by_auth_token!(cookies[:student_auth_token]) if cookies[:student_auth_token]
       
-      if @current_suser.lock?
+      if @current_suser and @current_suser.lock?
         @current_suser = false
       end
       
diff --git a/app/controllers/student/topics_controller.rb b/app/controllers/student/topics_controller.rb
index d880341..953e53c 100644
--- a/app/controllers/student/topics_controller.rb
+++ b/app/controllers/student/topics_controller.rb
@@ -1,6 +1,6 @@
 # -*- encoding : utf-8 -*-
 class Student::TopicsController < ApplicationController
- before_filter :auth_admin
+ before_filter :auth_suser
 
 
 layout "student"
diff --git a/app/views/layouts/admin_auth.haml b/app/views/layouts/admin_auth.haml
index ba7fce5..80b547b 100644
--- a/app/views/layouts/admin_auth.haml
+++ b/app/views/layouts/admin_auth.haml
@@ -7,14 +7,14 @@
     %title Connection
     = csrf_meta_tags
     = stylesheet_link_tag :admin_auth
+    = javascript_include_tag :connexion
    
   %body
-    
+    :coffeescript
+      $ ->
+        $.backstretch("/login_background.jpg")
     #flashs= bootstrap_flash
     .form-signin= yield
     
 
-    = javascript_include_tag "application"
-    
-    
-    
\ No newline at end of file
+   
\ No newline at end of file