Problem adding libraries to a JSF project using NETBEANS 5.5

[g-factor]

Hi everybody,

I am developing a web application in JSF, usign application server 9.0
update 1.
It works fine till I add 2 libraries, 2 .jar files in the project
properties.
I have to add these 2 libraries because I want to add some specific
controls on the JSF page. The libraries I am trying to add are:

1) tomahawk-1.1.3.jar
2) tomahawk-sandbox-1.1.5-SNAPSHOT.jar

The application deploys in the server, but when I launch it I get this
error in the browser:

"HTTP Status 404 -
description The requested resource () is not available. "

And this is the error message I get on the server log:

"Message ID:

WebModule[/PMA]Exception sending context initialized event to listener
instance of class com.sun.faces.config.ConfigureListener
java.lang.NoClassDefFoundError "


If I remove the libraries, rebuild and redeploy the application again
it works fine.
Any ideas how to make these libraries work on my project?

Thanks for reading.

Gabriele