Property Editor not registered with the PropertyEditorManager

    I´m trying to integrate a fully working jsf 1.1 application into JBoss 4.2.2 which uses jsf 1.2 which isn´t that compatible at all.
    I just have one implementation of the jsf-libs and not any in the application war.

    "ERROR [org.apache.catalina.core.ContainerBase.[jboss.web].[localhost].[samigo].[jsp]] Servlet.service() for servlet jsp threw exception
    org.apache.jasper.JasperException: Unable to convert string "#{authorFrontDoorMessages.auth_front_door}" to class "javax.el.ValueExpression" for attribute "value": Property Editor not registered with the PropertyEditorManager".

    And yes, i have been searching a lot on google and read a lot of the article and forum threads but i haven´t been able to solve this.
    I have been struggling with this problem more than a week now, so please give me a tip on what the problem might be.

    Any idea?