Null reference error when using Reflector API

Hi
I was writing a code that give me all references of methods in a dll.
I added reflector.exe in my reference. But whenever I am running I am getting assemblyManager as null. My cfg file contains [AssemblyManager].
static void Main(string[] args)
{
ArrayList listMethods = new ArrayList();
try
{
IServiceProvider serviceProvider = new ApplicationManager(null,true);
IAssemblyManager assemblyManager = (IAssemblyManager)
serviceProvider.GetService(typeof(IAssemblyManager));

What am I doing wrong ?
Thanks