EJB3 interceptor cannot bootstrap context

[sonicfab]

Hi.
I have a annotation-based EJB3 set up with Spring autowiring :

@Stateless(name = "WiringExampleFacade")
@Remote({WiringExample.class})
@Local({WiringExample.class}) 
@Interceptors(SpringBeanAutowiringInterceptor.class)
public class WiringExampleFacadeEJB implements WiringExample {

	// automatically injected with a matching Spring bean
    @Autowired
    private WiringExampleImpl delegate;

My EAR contains an EJB jar (at its root). In this jar, there is a folder called context which includes a file called beanRefContext.xml; said file contains :

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:context="http://www.springframework.org/schema/context"
       xsi:schemaLocation="http://www.springframework.org/schema/beans 
           http://www.springframework.org/schema/beans/spring-beans-2.5.xsd
           http://www.springframework.org/schema/context
    http://www.springframework.org/schema/context/spring-context-2.5.xsd">
         
     <!-- This will automatically declare several post-processors
          including the AutowiredAnnotationBeanPostProcessor -->      
     <context:annotation-config/>
     
     <import resource="classpath:businessBeans.xml" />
     
</beans>

If I understand things correctly, the AutoWiringInterceptor will use by default a ContextSingletonBeanFactoryLocator to retrieve the beanRefContext.xml from the classpath, so this setup should work.
Well, it doesn't.

Any help ?