When I created new dynamic web project in Eclipse, automatically created web.xml showed the following error:

cvc-elt.1: Cannot find the declaration of element 'web-app'

and a red background on this line:

<web-app id="WebApp_ID" 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">

I want to know why this error occur and how to get rid of this error. I used Eclipse version 3.1, Apache Tomcat 5.0 and JDK 1.4 in my project. I'm pretty new to Eclipse.

eclipse servlets web.xml
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