Mapping a composite key to two foreign keys

I have the following two tables:

Jobs
--------
JobNo
DivisionID

NCRs
--------
ID
JobNo
SpoilageJobNo
DivisionID

JobNo and DivisionID make up the composite key in the Jobs table (I know, but, unfortunately, it must be a composite key, since it is actually a representation of data from 4 different databases), and I need to join this key to the NCRs table as for JobNo, and for SpoilageJobNo.

I tried the following mappings:

<class name="Job" table="v_Jobs">
    <composite-id name="Key">
        <key-property name="JobNo"></key-property>
        <key-many-to-one name="Division" class="Division" column="DivisionID"/>
    </composite-id>

    <bag name="NCRs">
        <key>
            <column name="JobNo"></column>
            <column name="DivisionID"></column>
        </key>
        <one-to-many class="NCR"/>
    </bag>

    <bag name="SpoilageNCRs">
        <key>
            <column name="SpoilageJobNo"></column>
            <column name="DivisionID"></column>
        </key>
        <one-to-many class="NCR"/>
    </bag>
</class>

<class name="NCR" table="NCRs">
    <id name="ID">
        <generator class="identity"></generator>
    </id>

    <many-to-one name="Division"
                 class="Division"
                 column="DivisionID">
    </many-to-one>

    <many-to-one name="Job"
                 class="Job"
                 column="JobNo">
    </many-to-one>

    <many-to-one name="SpoilageJob"
                 class="Job"
                 column="SpoilageJobNo">
    </many-to-one>
</class>

But I just get the error message Foreign key (FK480F1031931B2CA4:NCRs [JobNo])) must have same number of columns as the referenced primary key (v_Jobs [JobNo, DivisionID])