diff --git a/app/controllers/users_controller.rb b/app/controllers/users_controller.rb
--- a/app/controllers/users_controller.rb
+++ b/app/controllers/users_controller.rb
@@ -125,7 +125,7 @@
 
       @summary[:count] += 1
       next unless sub.problem
-      problem[sub.problem] = [problem[sub.problem], (sub.points >= sub.problem.full_score) ? 1 : 0].max
+      problem[sub.problem] = [problem[sub.problem], ( (sub.try(:points) || 0) >= sub.problem.full_score) ? 1 : 0].max
     end
 
     @histogram[:summary][:max] = [@histogram[:data].max,1].max
@@ -133,6 +133,24 @@
     problem.each_value { |v| @summary[:solve] += 1 if v == 1 }
   end
 
+  def toggle_activate
+    @user = User.find(params[:id])
+    @user.update_attributes( activated:  !@user.activated? )
+    respond_to do |format|
+      format.js { render partial: 'toggle_button',
+                  locals: {button_id: "#toggle_activate_user_#{@user.id}",button_on: @user.activated? } }
+    end
+  end
+
+  def toggle_enable
+    @user = User.find(params[:id])
+    @user.update_attributes( enabled:  !@user.enabled? )
+    respond_to do |format|
+      format.js { render partial: 'toggle_button',
+                  locals: {button_id: "#toggle_enable_user_#{@user.id}",button_on: @user.enabled? } }
+    end
+  end
+
   protected
 
   def verify_online_registration
@@ -192,4 +210,5 @@
     admin_authorization
   end
   
+
 end