Spring 3 MVC and Apache Tiles 3 Integration Error

<bean id="viewResolver"
        class="org.springframework.web.servlet.view.tiles3.TilesViewResolver">
        <property name="viewClass">
            <value>
                org.springframework.web.servlet.view.tiles3.TilesView
            </value>
        </property>
    </bean>
    <bean id="tilesConfigurer"
        class="org.springframework.web.servlet.view.tiles3.TilesConfigurer">
        <property name="definitions">
            <list>
                <value>/WEB-INF/conf/tiles.xml</value>
            </list>
        </property>
    </bean>

<?xml version="1.0" encoding="UTF-8" ?>  
<!DOCTYPE tiles-definitions PUBLIC  
       "-//Apache Software Foundation//DTD Tiles Configuration 2.0//EN"  
       "http://tiles.apache.org/dtds/tiles-config_3_0.dtd">
<tiles-definitions>
    <definition name="base.definition" template="/WEB-INF/views/share/layout.jsp">
        <put-attribute name="title" value="" />
        <put-attribute name="header" value="/WEB-INF/views/share/header.jsp" />
        <put-attribute name="body" value="" />
        <put-attribute name="footer" value="/WEB-INF/views/share/footer.jsp" />
    </definition>

    <definition name="test/helloworld" extends="base.definition">
        <put-attribute name="title" value="helloworld" />
        <put-attribute name="body" value="/WEB-INF/views/test/helloworld.jsp" />
    </definition>
</tiles-definitions>