Jointable not used

[felle82]

Hi all,
I am working with Jboss 5 beta 4, JPA und the HSQL Database.
This is my JoinTable definition in class Subscription:

@ManyToMany(targetEntity=com.sap.sii.pubsub.entity.Subscriber.class, fetch = FetchType.EAGER)
@JoinTable(name = "SII_PUBSUB_SUBSCRIPTION_SUBSCRIBER",
 joinColumns = @JoinColumn(name = "SUBSCRIPTION_ID", referencedColumnName = "SUBSCRIPTION_ID"),
 inverseJoinColumns = @JoinColumn(name = "SUBSCRIBER_ID", referencedColumnName = "SUBSCRIBER_ID"))
public ArrayList<Subscriber> getSubscribers() {
 return subscribers;
}

The other side in class Subscriber:

@ManyToMany(targetEntity=com.sap.sii.pubsub.entity.Subscription.class, fetch=FetchType.EAGER, mappedBy="subscribers")
public ArrayList<Subscription> getSubscriptions() {
 return subscriptions;
}

And there is the table SII_PUBSUB_SUBSCRIPTION_SUBSCRIBER with the columns SUBSCRIPTION_ID andSUBSCRIBER_ID. But when I persist the entity this table is empty but there is are the columnssubscriptions and subscribers with some data looking like object references:([B@7f8124) in the tables of subscription and subscriber.