How to use the Manager interface

[Daniel Nazarkiewicz]

Hi,

I want to change the standard session manager.
I added in context.xml the <Manager className="packname.classname" />
In my netbeans ide 7, I created in source packages of my web application
the java class.
When i run my web application, tomcat told me it cannot find my manager.
What is the procedure to declare my session manager ?

Thank you
Daniel