Vaadin 7 + Liferay 5.2.3

I installed Vaadin 7 in a liferay 5.2.3 on a Glassfish 2.2.1. (I need to see if it is possible to use Vaadin 7 with these versions). I created a portlet. The portlet appears correctly but the menus of liferay stop working.

Any Idea?