i am try to deploy a simple application on
apache tomcat 5.0.
the server is giving me following error.

Catalina.start: java.lang.ClassNotFoundException: org/apache/catalina/mbeans/ServerLifecycleListener
java.lang.ClassNotFoundException: org/apache/catalina/mbeans/ServerLifecycleListener
    at java.lang.Class.forName0(Native Method)
    at java.lang.Class.forName(Class.java:164)
    at org.apache.catalina.util.xml.ObjectCreate.start(Xm lMapper.java:616)
    at org.apache.catalina.util.xml.XmlMapper.matchStart( XmlMapper.java:412)
    at org.apache.catalina.util.xml.XmlMapper.startElemen t(XmlMapper.java:91)
    at org.apache.xerces.parsers.AbstractSAXParser.startE lement(Unknown Source)
    at org.apache.xerces.parsers.AbstractXMLDocumentParse r.emptyElement(Unknown Source)
    at org.apache.xerces.impl.XMLDocumentFragmentScannerI mpl.scanStartElement(Unknown Source)
    at org.apache.xerces.impl.XMLDocumentFragmentScannerI mpl$FragmentContentDispatcher.dispatch(Unknown Source)
    at org.apache.xerces.impl.XMLDocumentFragmentScannerI mpl.scanDocument(Unknown Source)
    at org.apache.xerces.parsers.XML11Configuration.parse (Unknown Source)
    at org.apache.xerces.parsers.XML11Configuration.parse (Unknown Source)
    at org.apache.xerces.parsers.XMLParser.parse(Unknown Source)
    at org.apache.xerces.parsers.AbstractSAXParser.parse( Unknown Source)
    at javax.xml.parsers.SAXParser.parse(Unknown Source)
    at javax.xml.parsers.SAXParser.parse(Unknown Source)
    at org.apache.catalina.util.xml.XmlMapper.readXml(Xml Mapper.java:228)
    at org.apache.catalina.startup.Catalina.start(Catalin a.java:725)
    at org.apache.catalina.startup.Catalina.execute(Catal ina.java:681)
    at org.apache.catalina.startup.Catalina.process(Catal ina.java:179)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Nativ e Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(Native MethodAccessorImpl.java:39)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(De legatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:585)
    at org.apache.catalina.startup.Bootstrap.main(Bootstr ap.java:243)
is there something missing in the server config?
deployment description is as following
<?xml version="1.0" encoding="UTF-8"?>
<web-app id="WEBsOne" 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">
    <display-name>WEBsOne</display-name>
    <servlet>
    <servlet-name>SnoopServlet</servlet-name>
    <servlet-class>com.networkedObjects.root.SnoopServlet</servlet-class>
    </servlet>
    <servlet-mapping>
    <servlet-name>Snoop Servlet</servlet-name>
    <url-pattern>/snoop/*</url-pattern>
    </servlet-mapping>
    <welcome-file-list>
        <welcome-file>index.html</welcome-file>
        <welcome-file>index.htm</welcome-file>
        <welcome-file>index.jsp</welcome-file>
        <welcome-file>default.html</welcome-file>
        <welcome-file>default.htm</welcome-file>
        <welcome-file>default.jsp</welcome-file>
    </welcome-file-list>
</web-app>

thanks in advance.
mayuresh.