Tomcat 5.5 Manager - Domain names

We have Tomcat 5.5 as Java and HTTP server. We do not have Apache or IIS as http server for Tomcat.

We have configured domain names using server.xml <host> tags.

Example:
test.website.com
www.website_abc.com

Web contexts folders which are pointing to domain names are created directly under TOMCAT_HOME directory.

Web context folder which are NOT pointing to any domain names are created in webapps folder under TOMCAT_HOME

When we monitor using AppManager, we can see Tomcat server without any problems.

We have a problem with "Application Summary" box (below "Response Summary")

In the AppManager, "Application Summary" box shows session information as Zero sessions for those contexts where we have configured domain names. Contexts under webapps are OK and we can see session information.

Why we do not see session information for the contexts which are configured as domain names and are directly under TOMCAT_HOME folder?

May be it has something to do with Manager application since we do not see Domain name contexts in Manager application also.

Thanks
Gururaj