Developing my own tomcat valve

[Frederic Collin]

Hi , 
 
I would like to develop my own tomcat valve.
 
If I've well understanded, I have to:
 
-         Create a class extending org.apache.catalina.valves.ValveBase
-         Implement its invoke method
-         Add a <valve> entry in the server.xml file
-         Pack my class(es) into a jar file and copy it in the
[CATALINA_HOME]/server/lib directory
 
 
I've made all of these steps, but my valve seems not to be called when a
request arrives to tomcat. Can u tell me what's wrong ?
 
 
Thx !
 
 
Frederic Collin.