exception while developing an app in strut 2 framework

[cyberaishu]

Hi all
Whenever I start tomcat to run a strut 2 application im getting the
following error:
INFO: Parsing configuration file [struts-default.xml]
Aug 8, 2008 6:18:31 PM org.apache.catalina.core.StandardContext start
SEVERE: Error filterStart
Aug 8, 2008 6:18:31 PM org.apache.catalina.core.StandardContext start
SEVERE: Context [/workingstruts] startup failed due to previous errors
Aug 8, 2008 6:18:32 PM org.apache.coyote.http11.Http11Protocol start

Can anyone help me out with this?

My web.xml file is as follows:

<?xml version="1.0" encoding="UTF-8"?>
<web-app id="WebApp_9" version="2.4" xmlns="http://java.sun.com/xml/ns/
j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee
http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">

<filter>
<filter-name>struts2</filter-name>
<filter-class>org.apache.struts2.dispatcher.FilterDispatcher</
filter-class>
</filter>

<filter-mapping>
<filter-name>struts2</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>

</web-app>
Thanks
Aishwarya