Hibernate version:2.16

Mapping documents:
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 2.0//EN" "http://hibernate.sourceforge.net/hibernate-mapping-2.0.dtd">
<hibernate-mapping>
<class name="Productinfomain" table="ProductInfoMain" lazy="true">
<id name="id" column="sSysID" type="string">
<generator class="uuid.hex"/>
</id>
<property name="sproductid" column="sProductID" type="string" length="20"/>
<property name="sproductdisplayid" column="sProductDisplayID" type="string" length="20"/>
<property name="sproductname" column="sProductName" type="string" length="50"/>
<property name="sproductoccasion" column="sProductOccasion" type="string" length="50"/>
<property name="smodel" column="sModel" type="string" length="50"/>

<many-to-one name="producttypeObj" class="Sysbasicinfodetail" column="sProducttype" cascade="none" outer-join="auto" insert="false" update="false"></many-to-one>

</class>
</hibernate-mapping>

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<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 2.0//EN" "http://hibernate.sourceforge.net/hibernate-mapping-2.0.dtd">
<hibernate-mapping>
<class name="Sysbasicinfodetail" table="sysBasicInfoDetail" lazy="true">
<id name="id" column="sSysID" type="string">
<generator class="uuid.hex"/>
</id>
<property name="sitemname" column="sItemName" type="string" length="20"/>
<property name="sitemvalue" column="sItemValue" type="string" length="20"/>
</class>
</hibernate-mapping>



Productinfomain productinfomain =(Productinfomain) this.session.load(Productinfomain.class, sysID);
Sysbasicinfodetail producttype = productinfomain.getProducttypeObj();


I intend to use "lazy" to get associated object like this:


Productinfomain productinfomain =(Productinfomain) this.session.load(Productinfomain.class, sysID);
Sysbasicinfodetail producttype = productinfomain.getProducttypeObj();

i found the producttype is null,the class Sysbasicinfodetail mapping not work, why ?
but when i drop the lazy="true" in class Productinfomain mapping ,above code work well.
I am perplexed on why the Productinfomain mapping drop lazy="true" it work well?

Any help please reply back. Thanks
Name and version of the database you are using:sql server 2000

use Hibernate.initialize() before session close

furthermore,read chapter 12 in DOC