Hibernate version: 2.2

I am having trouble with a fairly complex relationship I am trying to create.

I want to have a child object which has a compound key, but part of that key comes from a field on another child object. In this case the JeanieUserTyped.ApplicationId = ShortCode.ApplicationId

Below is the invalid mapping file (applicationId is wrong)

Mapping documents:

<?xml version="1.0" encoding="utf-8" ?>
<hibernate-mapping xmlns="urn:nhibernate-mapping-2.2" namespace="JeanieMaster.Domain.Entities" assembly="JeanieMaster.Domain">
<class name="JeanieUser" table="DBSVR1.Jeanie_Master.dbo.JeanieUser" select-before-update="false" optimistic-lock="none">
<id name="Id" column="UserId" type="Int32">
<generator class="identity"/>
</id>

<property name="Mobile" type="String"/>
<property name="UniqueReoccurBillingRefId" type="String"/>
<property name="DateJoined" type="DateTime"/>
<property name="IsActive" type="Boolean"/>



<many-to-one name="MobileNetwork" class="MobileNetwork" column="MobileNetworkId" />
<many-to-one name="ShortCode" class="ShortCode" column="ShortCodeId" />
<many-to-one name="MobileHandset" class="MobileHandset" column="HandsetId" />

<many-to-one name="JeanieUserTyped" class="JeanieUserTyped">
<column name="Mobile" />
<column name="ApplicationId" />
</many-to-one>

</class>
</hibernate-mapping>