http://blogs.msdn.com/gzunino/archive/2007/06/27/biztalk-decompiler-for-reflector-5-on-codeplex.aspxMy BizTalk Decompiler only works with Reflector 4. The updated version for Reflector 5 has been available for a while on CodePlex: http://www.codeplex.com/reflectoraddinsen-USCommunityServer 2.1 SP1 (Build: 61025.2)