Can the COM interface be used in a 64bit .NET application?

 I've been having troubles with my .NET application that runs in pure 64bit mode (cannot run as 'any cpu' or 'x86') and the PDFCreator com interface and I thought I should ask - is this even possible? Or is the interop DLL a 32bit version which can't be loaded?

If someone could tell me if it is or it isn't, that would be great, so I can know whether I can keep trying to work out my problem, or write it off as that reason.