theme changes

app/controllers/desktop_controller.rb

@@ -19,7 +19,8 @@ class DesktopController< ApplicationController
   end
   
   def save_desktop_settings
-    Desktop.update_attributes(:theme => params["theme"])
+    @desktop = Desktop.find(params["id"])
+    @desktop.update_attributes(:theme => params["theme"])
      a = Array.new
      a << {"success"=>"true"}
      render :json=>a.to_json