请问为什么我配置的spring定时器在tomcat启动的时候没有执行？

<?xml version="1.0" encoding="UTF-8"?><beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:tx="http://www.springframework.org/schema/tx"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.0.xsd
           http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.0.xsd
           http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.0.xsd"
>    <!-- 要调用的工作类 -->
    <bean id="quartzJob" class="com.cqa.dispatcher.FaqTopicDispatcher"></bean>
    <!-- 定义调用对象和调用对象的方法 -->
    <bean id="jobtask"
        class="org.springframework.scheduling.quartz.MethodInvokingJobDetailFactoryBean">
        <!-- 调用的类 -->
        <property name="targetObject">
            <ref bean="quartzJob" />
        </property>
        <!-- 调用类中的方法 -->
        <property name="targetMethod">
            <value>run</value>
        </property>
    </bean>
    <!-- 定义触发时间 -->
    <bean id="doTime"
        class="org.springframework.scheduling.quartz.CronTriggerBean">
        <property name="jobDetail">
            <ref bean="jobtask" />
        </property>
        <!-- cron表达式 -->
        <property name="cronExpression">
            <value>0 0 12 * * ?</value>
        </property>
    </bean>
    <!-- 总管理类 如果将lazy-init='false'那么容器启动就会执行调度程序  -->
    <bean id="startQuertz" lazy-init="false" autowire="no"
        class="org.springframework.scheduling.quartz.SchedulerFactoryBean">
        <property name="triggers">
            <list>
                <ref bean="doTime" />
            </list>
        </property>
    </bean></beans>