nHibernate filter does not work when lazy loading is disabled?

Question

I am using nHibernate 2.1.2.4000 with Asp.Net 4.

I also have a mapping defined for an Entity. The mapping also defines a filter named CultureCode.

<?xml version="1.0" encoding="utf-8" ?>
<hibernate-mapping xmlns="urn:nhibernate-mapping-2.2">
    <class name="Demo.EntityCore.Domain.Option, Demo.EntityCore" table="tbl_options">
        <id name="Id" type="Int32" unsaved-value="0">
            <generator class="identity" />
        </id>
        <property name="Name" column="optionName" type="String"  />

        <bag name="OptionTrans"  table="tbl_options_trans" cascade="all-delete-orphan" >
            <key column="optionId" not-null="true"/>
            <one-to-many class="Demo.EntityCore.Domain.OptionTran, Demo.EntityCore"/>
            <filter name="cultureFilter" condition=":cultureCode = CultureCode"/>
        </bag>
    </class>
    <filter-def name="cultureFilter">
      <filter-param name="cultureCode" type="String" />
    </filter-def>
</hibernate-mapping>

The filter works fine if I load the entity as shown below and I get the filtered value in the list 'OptionTrans'

string cultureCode = Thread.CurrentThread.CurrentCulture.Name;
        ISession session = GetSession();
        session.EnableFilter("cultureFilter").SetParameter("cultureCode", cultureCode);

    var option = unitOfWork.Session().CreateCriteria<Option>()
                              .Add(Restrictions.Eq("Id", 1))
                              .UniqueResult<Option>();

    return product;

However if I change the lazy property of 'OptionTrans' field as false like shown below.

<bag name="OptionTrans"  table="tbl_options_trans" cascade="all-delete-orphan" lazy="false">

The filter specified above does not work and I get all the values in 'OptionTrans'.