Managed beans not instantiated with embedded Tomcat 5.5.15

[John]

I have Tomcat 5.5.15 embedded within our Java server application.
 
Tomcat is serving a JSF web application bundled as a war file.
 
The web application makes use of managed beans
 
This web application works fine when run in a Stand Alone Tomcat that is
not embedded.
 
When the web application is run within our embedded Tomcat, the managed
beans are not instantiated although no errors are produced.
 
 
Thanks,
John