Initialize Castle.AR and NHiberate

I tried to use Castle Project's ActiveRecord to map a .Net class to an Oracle DB in an ASP project. I followed the instruction to create an xml configuration file, to load the configuration and then to initialize ActiveRecord like this:

  XmlConfigurationSource source = new XmlConfigurationSource(
  "C:\\temp\\ActiveRecords.xml");

  ActiveRecordStarter.Initialize(source, typeof(Employee));

I got a failure exception when Initialize() method is called. I struggled for almost a whole day to find out why, and downloaded Castle's example project as well. I got the same error message (System.TypeInitializationException).

Finally, I found out in the detail information in debug mode that the inner exception was caused by "could not find log4net.dll file". When I checked the path for this file in the project references, I realized that it points to a wrong dll file in the MBUnit folder. After I removed and re-added the correct dll file, the problem was solved!