How to make JSF beans transactional

First of all, sorry for my English.

So, I'm working with JSF. Recently we decided to exclude service layer from our project, cause this layer in 80% of cases consist only of recalling the same named dao-methods (definelty, I know, that this way is "not true"). So, now we need to make our managed beans layer transactional, and here is the problem: I can make dao-layer transactional, but when I try to move this duty to managegbeans layer, I get an

org.hibernate.HibernateException: No Session found for current thread

Dao and managedbeans layers are in separated modules, so they have separated context.xml files. When i define tx:annotation-driven tag in dao's context.xml file, @Transactional annotations in classes in dao-module are "visible", but when I try to define this tag in managedbeans context.xml file, none of the @Transactional annotations (neiter the dao, nor the managedbeans) are visible, so i get an exception.

Any ideas, how I can correctly configure transactions?

applicationContext-dao.xml

 <jee:jndi-lookup id="dataSource" jndi-name="java:/MSSQLDataSource"/>

<bean id="sessionFactory" class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">
    <property name="dataSource" ref="dataSource"/>

    <property name="packagesToScan">
        <list>
            <value>com.exadel.ubs.rss.entity</value>
        </list>
    </property>

    <property name="hibernateProperties">
        <props>
            <prop key="hibernate.dialect">org.hibernate.dialect.SQLServerDialect</prop>
            <prop key="hibernate.show_sql">true</prop>
            <prop key="hibernate.format_sql">true</prop>
        </props>
    </property>
</bean>

<bean id="txManager" class="org.springframework.orm.hibernate4.HibernateTransactionManager">
    <property name="sessionFactory" ref="sessionFactory"/>
</bean>

<context:component-scan base-package="com.exadel.ubs.rss.dao"/>

applicationContext-web.xml

<context:annotation-config />

//Just because of the service layer is not fully removed, de facto we are using this import only for imort dao-context
<import resource="classpath:/applicationContext-service.xml"/>

<context:component-scan base-package="com.exadel.ubs.rss"/>

<tx:annotation-driven transaction-manager="txManager" proxy-target-class="false"/>

<bean class="org.springframework.context.annotation.CommonAnnotationBeanPostProcessor" />

Context param and listeners in web.xml

 <context-param>
    <param-name>contextConfigLocation</param-name>
    <param-value>
        classpath:/applicationContext-web.xml
        classpath:/applicationContext-security.xml
    </param-value>
</context-param>

<listener>
    <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>

<listener>
    <listener-class>com.company.project.util.ServletContextListenerConfig</listener-class>
</listener>

ServletContextListenerConfig class:

public class ServletContextListenerConfig implements ServletContextListener {

    public void contextInitialized(ServletContextEvent event) {
        System.setProperty("org.apache.el.parser.COERCE_TO_ZERO", "false");
    }

    public void contextDestroyed(ServletContextEvent event) {
        // NOOP
    }
}

Thanks in advance!