Hi Guys, This is my first post here, and I'm new to NService Bus world. After play around for a couple days, and found that it's really powerful framework to creat service and easy to use. :) Now, I came across a small question. I created a project which uses NServiceBus, it got normal message handlers and Saga handlers. And also I created a couple tests around these with NServiceBus.Testing framework. It all works fine when I run the tests via ReSharper Test Runner works and NUnit console, they all works fine, but when I include them into NAnt build script, it throw the following exception: System.Reflection.ReflectionTypeLoadException : Unable to load one or more of the requested types. Retrieve the LoaderExceptions property for more information. at System.Reflection.Module.GetTypesInternal(StackCrawlMark& stackMark) at System.Reflection.Assembly.GetTypes() at NServiceBus.Configure.<c_DisplayClass1.b__0(Assembly a) at System.Array.ForEach[T](T[] array, Action`1 action) at NServiceBus.Configure.With(Assembly[] assemblies) at NServiceBus.Configure.With(String probeDirectory) at NServiceBus.Configure.With() at NServiceBus.Testing.Test.Initialize() Any ideas? Thanks a lot.