web.xml的奇怪问题

这几天在用WTP时，web.xml文件老是报错：

Referenced file contains errors (http://www.ibm.com/webservices/xsd/j2ee_web_services_client_1_1.xsd).  For more information, right click on the message and select "Show Details..."，按照提示，查看"Show Details..."，错误如下：

The errors below were detected when validating the file "j2ee_web_services_client_1_1.xsd" via the file "web.xml".  In most cases these errors can be detected by validating "j2ee_web_services_client_1_1.xsd" directly.  However it is possible that errors will only occur when j2ee_web_services_client_1_1.xsd is validated in the context of web.xml.

web.xml配置文件是WTP自动生成的，如下：

<!--sp-->xml version="1.0" encoding="UTF-8"?>   
<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">   
    <display-name>Ajaxdisplay-name>   
    <welcome-file-list>   
        <welcome-file>index.htmlwelcome-file>   
        <welcome-file>index.htmwelcome-file>   
        <welcome-file>index.jspwelcome-file>   
        <welcome-file>default.htmlwelcome-file>   
        <welcome-file>default.htmwelcome-file>   
        <welcome-file>default.jspwelcome-file>   
    welcome-file-list>   
web-app>   

 

这个web.xml文件是不会有问题的，难道是web.xml文件的验证文件更换了？

 上网下载了Lomboz，新建一个动态WEB工程，也报同样的错误，但用MyEclipse打开却没有这个问题，郁闷！！