hibernate association mistery

Hi,
I have this error:
An association from the table Aliqcostorep refers to an unmapped class: modelObj.Coerg4Tbrep

but in my hibernate.cfg.xml I have:

and Aliqcostorep.hbm.xml is:

<hibernate-mapping>
    <class name="Aliqcostorep" table="ALIQCOSTOREP" schema="JUSTIN" catalog="S6571A4C">
        <comment></comment>
        <composite-id name="id" class="AliqcostorepId">
            <key-property name="tipocosto" type="string">
                <column name="TIPOCOSTO" length="3" />
            </key-property>
            <key-property name="datrif" type="int">
                <column name="DATRIF" />
            </key-property>
            <key-property name="reparto" type="string">
                <column name="REPARTO" length="3" />
            </key-property>
        </composite-id>
        <many-to-one name="coerg4Tcpn0" class="Coerg4Tcpn0" update="false" insert="false" fetch="select">
            <column name="TIPOCOSTO" length="3" not-null="true">
                <comment></comment>
            </column>
        </many-to-one>
        <many-to-one name="coerg4Tbrep" class="Coerg4Tbrep" update="false" insert="false" fetch="select">
            <column name="REPARTO" length="3" not-null="true">
                <comment></comment>
            </column>
        </many-to-one>
        <property name="aliqdirect" type="java.lang.Float">
            <column name="ALIQDIRECT" precision="24" scale="0">
                <comment></comment>
            </column>
        </property>
    </class>
</hibernate-mapping>

and Coerg4Tbrep.hbm.xml is:

and Coerg4Tcpn0.hbm.xml is:

<hibernate-mapping>
    <class name="Coerg4Tcpn0" table="COERG4_TCPN0" schema="JUSTIN" catalog="S6571A4C">
        <comment></comment>
        <id name="fcodtc" type="string">
            <column name="FCODTC" length="3" />
            <generator class="assigned" />
        </id>
        <property name="fnomtc" type="string">
            <column name="FNOMTC" length="30">
                <comment></comment>
            </column>
        </property>
        <property name="ftipda" type="string">
            <column name="FTIPDA" length="1">
                <comment></comment>
            </column>
        </property>
        <set name="coerg4Cstl0s" inverse="true">
            <key>
                <column name="CSLTCO" length="3" not-null="true">
                    <comment></comment>
                </column>
            </key>
            <one-to-many class="Coerg4Cstl0" />
        </set>
        <set name="aliqcostoreps" inverse="true">
            <key>
                <column name="TIPOCOSTO" length="3" not-null="true">
                    <comment></comment>
                </column>
            </key>
            <one-to-many class="Aliqcostorep" />
        </set>
    </class>
</hibernate-mapping>

where is the problem?

Regards,
AlexGio.