Problem in deploying Servlet

Hello Friends,
I have donwloaded and installed Apache Tomcat 6.0.14. Everything is successfully installed and I can access the page http://localhost:8080 and see the tomcat welcome page.
I give the username and password and access the Manager page. But when I click on the /host-manager it gives me the following error.

HTTP Status 404 - /host-manager/

type Status report

message /host-manager/

description The requested resource (/host-manager/) is not available.
Apache Tomcat/5.5.27

The same error is shown for /manager and also /Ch1 as well....
I am not creating a duplicate thread for the same problem but I have gone through other posts and tried all the solutions given.... still its not working....
I have tried
1) in the root web.xml, uncommenting the Invoker servlet
2) making sure there is no space in <servlet-name> tag
3) trying different encodings like iso-8859-1, utf-8

but still the problem exists....
can anyone please help me on this.... thanks....

Hi,
Not sure what it does.
To access use this URL

http://localhost:8080/host-manager/html

HTH.