Spring - De XML para anotações

<bean id="txManager" class="org.springframework.orm.jpa.JpaTransactionManager">
	<property name="entityManagerFactory" ref="entityManagerFactory" />
</bean>
<bean id="entityManagerFactory"
		class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
		<property name="dataSource" ref="myDataSource" />
		<property name="jpaVendorAdapter">
			<bean class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter">
				<property name="showSql" value="${jpa.show.sql}" />
				<property name="generateDdl" value="${jpa.generate.ddl}" />
				<property name="database" value="${jpa.database}" />
			</bean>
		</property>
		<property name="jpaProperties">
			<props><prop key="hibernate.dialect">${jpa.dialect}</prop></props>
		</property>
	</bean>

@Bean
	public LocalContainerEntityManagerFactoryBean entityManagerFactory() {
		lcemf = new LocalContainerEntityManagerFactoryBean();
		lcemf.setDataSource(dataSource());
		lcemf.setJpaVendorAdapter(jpaVendorAdapter());
		Properties properties = new Properties();
		properties.setProperty("hibernate.dialect", dialect);
		lcemf.setJpaProperties(properties);
		return lcemf;
	}
	
	//@Bean
	public JpaTransactionManager txManager() {
		jtm = new JpaTransactionManager();
		// Aqui está o erro....
		jtm.setEntityManagerFactory(entityManagerFactory());
		return jtm;
	}