org.icefaces.warnBeforeSessionExpiryInterval causes exception

I have the above component in my web.xml as a context param in order to warn the user before the session timeouts. When I click on a checkboxButton on a xhtml page I created, I get this error: javax.faces.FacesException: Cannot add the same component twice: reset_session_expiry_timeout. Has anyone else encountered this and know a fix? Thanks!