Spring MVC read property file null in DAOImpl

I need to read a property value in my UserDetailsDaoImpl. I'm using Spring Security.

It succesfully reads inside of a @Controller but not in this class maybe because it's a @Repository.

What can i do to read the property value?

UserDetailsDaoImpl:

@Repositorypublic class UserDetailsDaoImpl extends JdbcDaoSupport implements UserDetailsDao {    @Value("${emails_blocked}")    private String emails_blocked;

Beans:

<context:property-placeholder location="classpath:config.properties"/>

edit:

this is how i call UserDetailsDaoImpl:

@AutowiredUserDetailsDao userDetailsDao;@Overridepublic Authentication authenticate(Authentication authentication) throws AuthenticationException {    try {        Authentication auth = super.authenticate(authentication);        // if reach here, means login success, else exception will be thrown        // reset the user_attempts        userDetailsDao.resetFailAttempts(authentication.getName());        return auth;    } catch (BadCredentialsException e) {        userDetailsDao.updateFailAttempts(authentication.getName());        throw e;    }

my beans updated:

<beans:bean id="userDetailsDao" class="com.setelog.spring.dao.UserDetailsDaoImpl"><beans:property name="dataSource" ref="dataSource" /></beans:bean><beans:bean id="encoder" class="org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder"/><beans:bean id="authenticationProvider"    class="com.setelog.spring.handler.LimitLoginAuthenticationProvider"><beans:property name="userDetailsService" ref="customUserDetailsService" /><beans:property name="userDetailsDao" ref="userDetailsDao" /><beans:property name="passwordEncoder" ref="encoder" /></beans:bean>