For UI personalization to be functional, you need to go to Site Manager -> Settings -> Security and enable it using the Enable UI personalization check-box.

 

Using the Site drop-down, you can decide if you want to turn it on globally, or just for some particular sites in the system.

 

 

Page url: http://devnet.kentico.com/docs/devguide/index.html?enabling_ui_personalization.htm