JBoss, Tomahawk, Stack Overflow.

Hi,
I want to try out Apache Tomahawk. After trying to configure Tomahawk like described on their site I get a Stack Overflow exception.
I use
JBoss 4.2.2.GA out of the box.
commons-el.jar
commons-fileupload-1.2.1.jar
tomahawk-1.1.7.jar (in WEB-INF/lib)
web.xml:

<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee <a href="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"" target="_blank" rel="nofollow">http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"</a> id="WebApp_ID" version="2.5">
  <display-name>TomahawkDataTable</display-name>
  <welcome-file-list>
    <welcome-file>index.html</welcome-file>
    
  </welcome-file-list>
  <servlet>
    <servlet-name>Faces Servlet</servlet-name>
    <servlet-class>javax.faces.webapp.FacesServlet</servlet-class>
    <load-on-startup>1</load-on-startup>
  </servlet>
  <servlet-mapping>
    <servlet-name>Faces Servlet</servlet-name>
    <url-pattern>*.jsp</url-pattern>
  </servlet-mapping>
  
  <filter>
<filter-name>MyFacesExtensionsFilter</filter-name>
<filter-class>org.apache.myfaces.webapp.filter.ExtensionsFilter</filter-class>
    <init-param>
        <param-name>uploadMaxFileSize</param-name>
        <param-value>20m</param-value>
        <description>Set the size limit for uploaded files.
            Format: 10 - 10 bytes
                    10k - 10 KB
                    10m - 10 MB
                    1g - 1 GB
        </description>
    </init-param>
</filter>
 

<filter-mapping>
    <filter-name>MyFacesExtensionsFilter</filter-name>
    
    <servlet-name>Faces Servlet</servlet-name>
</filter-mapping>
 

<filter-mapping>
    <filter-name>MyFacesExtensionsFilter</filter-name>
    <url-pattern>/faces/myFacesExtensionResource/*</url-pattern>
</filter-mapping>
  
</web-app>

page:

from server.log:

Apparently the getAttribute Method has been called several hundred times.

What is wrong?

Many thanks for any advice.

Hans