Hi everybody,
I have the following mapping files:

<class name="Sucursal" table="Sucursales" lazy="true" >
<composite-id>
<key-property name="Oficina" column="codigo" />
<key-many-to-one name="Banco" column="entidad" class="Banco" />
</composite-id>
....
</class>

<class name="Banco" table="Entidades" lazy="true" >
<id name="Codigo" column="codigo" >
<generator class="native"/>
</id>
<property name="Nombre" column="entidad" />

<set name="Oficinas" lazy="true" inverse="true" outer-join="false">
<key column="entidad" />
<one-to-many class="Sucursal" />
</set>

</class>


When I try to use association criteria i have this exception:

[ADOException: Unable to perform find]
NHibernate.Impl.SessionImpl.Find(CriteriaImpl criteria) in E:\Proyectos\NHibernate-0.99-rc2\Impl\SessionImpl.cs:4768
NHibernate.Impl.CriteriaImpl.List() in E:\Proyectos\NHibernate-0.99-rc2\Impl\CriteriaImpl.cs:262
trozosarco.IntroducirVisita.Page_Load(Object sender, EventArgs e) in C:\Inetpub\wwwroot\trozosarco\comerciales\IntroducirVisita.aspx.vb:71
System.EventHandler.Invoke(Object sender, EventArgs e) +0
System.Web.UI.Control.OnLoad(EventArgs e) +67
System.Web.UI.Control.LoadRecursive() +35
System.Web.UI.Page.ProcessRequestMain() +750


The code is this:


criterio = nhSession.CreateCriteria(GetType(Sucursal))
criterio.CreateCriteria("Banco").Add(Expression.Eq("Codigo", banco))
criterio.List()


Thanks !!!