Failed to read schema document 'http://www.springframework.org/schema/beans/spring-beans-2.5.xsd',

[Solo Chiang]

Hello to all Spring expert,
I am learning Spring framework and try to get some on-hand experience by following the tutorial at
http://static.springframework.org/docs/Spring-MVC-step-by-step/index.html

My environment is followed
IDE: Eclipse 3.4.2
Server: Tomcat-6.0.18
JDK:1.6.0

But for some unknown reason, when I start Tomcat server and
My /springapp/WebContent/WEB-INF/springapp-servlet.xml seems to have some problem

    
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.5.xsd">
  <bean name="/hello.htm" class="springapp.web.HelloController"/>
</beans>

Instead of start making use of the bean, I have the following error instead

WARNING: Ignored XML validation warning
org.xml.sax.SAXParseException: schema_reference.4: Failed to read schema document 'http://www.springframework.org/schema/beans/spring-beans-2.5.xsd', because 1) could not find the document; 2) the document could not be read; 3) the root element of the document is not <xsd:schema>.
  at com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.createSAXParseException(Unknown Source)

Does anyone know what cause this and how to fix it?