Hello, I import the new library richfaces 4.0, but in my project when compiled show the error

package org.ajax4jsf.component.html does not exist, 

import org.ajax4jsf.component.html.HtmlAjaxCommandLink;

who is the problem?, before uses de richfaces 3.3 in my spring proyect by now when update library to richfaces 4.0 show error.

Exists problems in librarys? or How I can resolve the problem.

Thank You.