Using JPA with Hibernate implementation: entityManager.remove - not working

I am using JPA over implementation Hibernate 4.1.4.Final. My problem is that I can’t work EntityManager#remove(). All the rest: update, insert, selection operation only work perfectly, except for this.

My persistence.xmlfile:

<persistence-unit name="myEntityManager">
    <provider>org.hibernate.ejb.HibernatePersistence</provider>
    <class>core.entity.Answer</class>
    <class>core.entity.BaseEntity</class>
    <exclude-unlisted-classes>true</exclude-unlisted-classes>
    <validation-mode>NONE</validation-mode>
    <properties>
        <property name="hibernate.dialect" value="org.hibernate.dialect.MySQLDialect"/>
        <property name="hibernate.show_sql" value="true"/>
        <property name="hibernate.hbm2ddl.auto" value="update"/>
    </properties>
</persistence-unit>

My Answerentity: (the BaseEntity class just contains the primary key - ID)

@Entity
@Table(name = "ANSWER")
@Inheritance(strategy = InheritanceType.TABLE_PER_CLASS)
public class Answer extends BaseEntity {

    @Column(name = "ANSWER_VALUE")
    private String answerValue;

    @ManyToOne(fetch = FetchType.EAGER)
    @JoinColumn(name = "QUESTION_ID", nullable = false)
    private Question question;                

    //overrided equals, hascode, toString 
    // all getters and setters
}

When called:

public void remove(T entity) {
    this.entityManager.remove(this.entityManager.merge(entity));
}

Also tried:

this.entityManager.remove(entity);

and

T ref = entityManager.getReference(entityClass, primaryKey);
entityManager.remove(ref);

No luck :( it does not delete the record Answerfrom the database.

I am using Spring configuration to configure entity manager as follows:

<bean id="persistenceUnitManager" class="org.springframework.orm.jpa.persistenceunit.DefaultPersistenceUnitManager">
    <property name="persistenceXmlLocations">
        <list>
            <value>classpath*:META-INF/persistence.xml</value>
        </list>
    </property>
    <property name="defaultDataSource" ref="dataSource"/>
</bean>

<bean id="entityManagerFactory" class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
    <property name="persistenceUnitManager" ref="persistenceUnitManager"/>
    <property name="persistenceUnitName" value="myEntityManager"/>
</bean>

<bean id="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager">
    <property name="entityManagerFactory" ref="entityManagerFactory"/>
</bean>

<tx:annotation-driven proxy-target-class="true" transaction-manager="transactionManager"/>

removecalled in a method that is annotated with an annotation @Transactional. So this should not be a problem.

Hibernate SQL, . , delete .

. , .

, :

. :

@OneToMany(fetch = FetchType.LAZY, cascade = CascadeType.ALL, mappedBy = "evaluationPart")
private List<Answer> answers = new LinkedList<>();

:

List<Answer> answers = evaluationPart.getAnswers();
if (answers != null && answers.size() > 0) {
    for (Answer answer : answers) {
        answerFacade.remove(answer); //This calls enetityManager.remove
    }
}