Hi

Im presently looking to build a fresh application using a standard 3 tier architecture, however im struggling to get the mapping files to work correctly.

I have create

PresentationLayer
BusinessLogicLayer (class lib)
DataAccessLayer (class lib)
DataObjects (class lib)

As seperate projects, Data Objects contains the table mappings and class definitions for the table objects, i want to use this openly across all the other tiers in the application, in my presentation layer i have my web config which contains under the hibernate config

<mapping assembly="DataObjects"/>

However as soon as i try and impliment a query i receive

Companies is not mapped [FROM Companies]

Under my Mappings folder within DataObjects namespace i have

<hibernate-mapping xmlns="urn:nhibernate-mapping-2.2" namespace="DataObjects" assembly="DataObjects">
<class name="DataObjects.Companies, DataObjects" table="Companies" lazy="false">
<id name="DataObjects.CompanyID">
<column name="CompanyID"/>
<generator class="native"/>
</id>
<property name="CompanyName">
<column name="CompanyName"/>
</property>
<property name="CompanyCreatedDate">
<column name="CompanyCreatedDate"/>
</property>
<property name="CompanyActive">
<column name="CompanyActive"/>
</property>
</class>
</hibernate-mapping>

The hbm files are also set as embedded resource, so im just wondering if anyone has any ideas where i could be going wrong or any links to a good tutorial which follows a similar approach, as all the ones i have seen so far use a single lib to wrap the mapping / data access / business logic into.

Thanks appreciate any advice anyone can provide.

Mike