title: Calling 32bit COM from c# running in 64bit mode
body: <p>I have a 3rd party COM object(32 bit) that I need to call from my c# application (64 bit).
  I know I have to run the COM object in a separate process.
  This COM object has many classes implemented in it, so I'm trying to avoid writing my own remoting wrapper that exposes all the methods.  COM+ seems to be the most straightforward solution.  I opened the Component Services menu, created a new COM+ Application, added my COM object as a component to this application.  Everything seemed to import beautifully.</p>
  
  <p>In my C# application, I added the original COM object as a reference (which automatically generates the type library).  Using the type library reference, I can create objects from from the COM+ component (I see them begin to spin in the Component Services window), but when I try to access on of the methods of the object, I get an error saying the interface is not registered.</p>
  
  <p>Does anyone have a clue?  I went back and ran regsvr32 on the COM object, but I don't think it was necessary, and it didn't help.
  Is my usage in C# correct?  VS2008 autocomplete had no problem seeing those methods.</p>
  
  <p>The exact exception is:
     "Interface not registered (Exception from HRESULT:0x80040155)"</p>
  
  <p>Unclear about exactly what the permissions and roles are about in the Component Services, I tried setting up the COM+ object identity to run under the System Account, both as a local service and as interactive user.  I've added Everyone as a user in the Roles.
  Everything is running locally, so there shouldn't be an issue with file privileges or anything like that.</p>
  
  <p>I also want to reiterate that this COM object contains many classes. I successfully instantiated one class object in my client and set some property values.
  I also successfully instantiated another class object, but received this exception when attempting to call a method of this second object .... so I don't <em>think</em> there is an issue with which registry my COM object is registered in.</p>