I would like to integrate 7-zip context menu shell inside and found an option if I check the plugin but nothing happens. how can I do?

The context menu of 7-zip is not portable and is not integrated in Liberkey solution, but by using Key File Assoc from Liberkey launcher (Liberkey Tools -> Enable files associations) you can add rick click actions to your context menu (but no cascading until now). Follow this link for KFA - tricks and tips (French)