Problem getting manager with tomcat 5.0.19

[zze-MORON Fran�ois FTRD/DMI/REN]

I installed tomcat in C:\Apps\tomcat and made changes to manager.xml in 
C:\Apps\tomcat\conf\Catalina\localhost :

<Context path="/manager" docBase="c:/apps/tomcat/server/webapps/manager"
        debug="0" privileged="true">

When I try to reach http://localhost:8080/manager I have a 404 error. What's wrong.

Fran�ois