Logger e Timer do WebWork

Front-end
#1

Pessoal, como eu uso isto do WW2

<interceptor-ref name=“logger”/>
<interceptor-ref name=“timer”/>

Eu coloco isto no xwork.xml e nada muda !!!

minha configuração esta assim:

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&lt;interceptors&gt;
   &lt;interceptor-stack name="systemDefaultStack"&gt;
   &lt;interceptor-ref name="validationWorkflowStack"/&gt;
   &lt;interceptor-ref name="logger"/&gt;
   &lt;interceptor-ref name="timer"/&gt;
   &lt;/interceptor-stack&gt;
 &lt;/interceptors&gt;
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#2