This is how my project looks like:
MyProg.Data -> Contains all classes
MyProg.Data.Default -> default/old database implementation
MyProg.Data.NHibernated -> NHibernate implementation, contains .hbm.xml files

These are different assemblies.

When I try to add the Assembly to the config, is tells me it can't find the classes, when I add the classes, it can't find the .hbm.xml files...

In the .hbm.xml file I have specified this:


how can I keep hbm's and classes seperate, and still have NHibernate running?

I found my error (after 2 days):

I forgot the assembly attribute of the class node in the mapping file