spring配置问题 急！

<bean id="passwordEncoder" class="org.springframework.security.providers.encoding.ShaPasswordEncoder"/>    <bean id="sessionStore" class="org.gctech.yhaot.session.MemorySessionStore">
        <property name="passwordEncoder" ref="passwordEncoder"/>
    </bean>    <bean id="iSessionManager" class="org.gctech.yhaot.service.impl.SessionManagerImpl">
        <property name="sessStore" ref="sessionStore"/>
    </bean>    <bean id="authManager" class="org.gctech.yhaot.service.impl.AuthManagerImpl">
         <property name="iSessManager" ref="iSessionManager"/>                      
     </bean>
Tomcat启动时有异常：Caused by: org.springframework.beans.InvalidPropertyException: Invalid property 'iSessManager' of bean class [org.gctech.yhaot.service.impl.AuthManagerImpl]: No property 'iSessManager' found
        at org.springframework.beans.BeanWrapperImpl.convertForProperty(BeanWrapperImpl.java:382)
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.convertForProperty(AbstractAutowireCapableBeanFactory.java:1287)
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyPropertyValues(AbstractAutowireCapableBeanFactory.java:1248)
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1008)
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:470)
        ... 50 more
怎么回事？高手帮帮小弟，谢谢了！