Mapping CMP field with PK (DB sequence)

[morenito9000]

Hi all,
when I try to create a CMP Entity Bean I get an error:
null value in column xmoid .... could not create entity bean.

xmoid is the PK of the table info_allegato.
Values assigned to xmoid are retrieved from a db sequence (info_allegato_xmoid_seq).

I'm using JBoss 3.2.3, Postgresql 7.4 according to EJB 2.1 specs
(I'm not up-to-date :-)).

I tried different combinations of xdoclet tags inside InfoAllegatoEntityBean.java class with the same bad result :-(

I report java code (and xdoclet tags) related to CMP field
that maps PK of DB table.

 * @ejb.bean name = "InfoAllegatoEntity"
 * local-jndi-name = "ejb/InfoAllegatoEntity"
 * type = "CMP"
 * display-name = "InfoAllegato Entity Bean"
 * description = "Entity CMP..."
 * view-type = "local"
 * cmp-version = "2.x"
 * primkey-field = "xmoid"
 *
 * @ejb.persistence table-name = "info_allegato"
 *
 * @jboss.persistence table-name = "info_allegato"
 *
 * @ejb.pk class="java.lang.Integer"
 * generate="false"
 *
 * @jboss.unknown-pk class = "java.lang.Integer"
 * column-name = "xmoid"
 * jdbc-type = "INTEGER"
 * sql-type = "INTEGER"
 * auto-increment = "true"
 *
 * @jboss.entity-command name = "postgresql-fetch-seq"
 * class = "org.jboss.ejb.plugins.cmp.jdbc.keygen.JDBCPostgreSQLCreateCommand"
 *

/**
 * @ejb.create-method
 * @exception = "javax.ejb.CreateException"
 */
public Integer ejbCreate(String prodotto, Integer idMalf) throws javax.ejb.CreateException {

 /* I don't set pk field xmoid */

 setProdotto(prodotto);
 setIdMalf(idMalf);
 return null;
}

/**
 *
 * @exception = "javax.ejb.CreateException"
 */
public void ejbPostCreate(String prodotto, Integer idMalf) throws javax.ejb.CreateException {
}


/**
 * @ejb.persistence column-name = "xmoid"
 * @ejb.pk-field
 *
 *
 * @jboss.column-name = "xmoid"
 * @jboss.persistence not-null = "true"
 * @jboss.persistence auto-increment = "true"
 *
 * @return
 */
public abstract Integer getXmoid();

/**
 * @param xmoid
 */
public abstract void setXmoid(Integer xmoid);

Could anyone tell me if something is wrong in this code ?
Deploy of Entity Bean is ok but when I call create() method
of Entity Bean InfoAllegato I get the error.

Any help is very very appreciated.
Thanks in advance.

Moreno